chore(core): standardize SPDX copyright headers

Add SPDX copyright and license headers to source, test, migration,
template, and static files throughout the project.

Include the maintainer email in copyright notices and fill in the BSD
license copyright holder.

22 files changed, 99 insertions, 1 deletions

diff --git a/webmentions_ssg/__init__.py b/webmentions_ssg/__init__.py
index 3928195..ad77667 100644
--- a/webmentions_ssg/__init__.py
+++ b/webmentions_ssg/__init__.py
@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: 2026 Dennis Fink
+# SPDX-FileCopyrightText: 2026 Dennis Fink <me+coding@dennisfink.me>
 #
 # SPDX-License-Identifier: BSD-3-Clause
 
diff --git a/webmentions_ssg/auth.py b/webmentions_ssg/auth.py
index 7bd93a3..de5b297 100644
--- a/webmentions_ssg/auth.py
+++ b/webmentions_ssg/auth.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2026 Dennis Fink <me+coding@dennisfink.me>
+#
+# SPDX-License-Identifier: BSD-3-Clause
+
 from flask_login import LoginManager
 
 from . import DATABASE as db
diff --git a/webmentions_ssg/config.py b/webmentions_ssg/config.py
index 6996b57..72842c4 100644
--- a/webmentions_ssg/config.py
+++ b/webmentions_ssg/config.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2026 Dennis Fink <me+coding@dennisfink.me>
+#
+# SPDX-License-Identifier: BSD-3-Clause
+
 import logging
 import secrets
 
diff --git a/webmentions_ssg/forms/__init__.py b/webmentions_ssg/forms/__init__.py
index c386eb1..7ab82e3 100644
--- a/webmentions_ssg/forms/__init__.py
+++ b/webmentions_ssg/forms/__init__.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2026 Dennis Fink <me+coding@dennisfink.me>
+#
+# SPDX-License-Identifier: BSD-3-Clause
+
 import re
 
 from flask_wtf import FlaskForm
diff --git a/webmentions_ssg/forms/validators.py b/webmentions_ssg/forms/validators.py
index c4b5eda..fd54e0f 100644
--- a/webmentions_ssg/forms/validators.py
+++ b/webmentions_ssg/forms/validators.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2026 Dennis Fink <me+coding@dennisfink.me>
+#
+# SPDX-License-Identifier: BSD-3-Clause
+
 from urllib.parse import urlsplit
 
 from flask import current_app
diff --git a/webmentions_ssg/models.py b/webmentions_ssg/models.py
index f89e587..e7ff0be 100644
--- a/webmentions_ssg/models.py
+++ b/webmentions_ssg/models.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2026 Dennis Fink <me+coding@dennisfink.me>
+#
+# SPDX-License-Identifier: BSD-3-Clause
+
 from __future__ import annotations
 
 import uuid
diff --git a/webmentions_ssg/static/js/confirmation-modal.js b/webmentions_ssg/static/js/confirmation-modal.js
index e278790..fee825f 100644
--- a/webmentions_ssg/static/js/confirmation-modal.js
+++ b/webmentions_ssg/static/js/confirmation-modal.js
@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2026 Dennis Fink <me+coding@dennisfink.me>
+//
+// SPDX-License-Identifier: BSD-3-Clause
+
 document.addEventListener("DOMContentLoaded", () => {
   const confirmationModal = document.getElementById("confirmation-modal");
 
diff --git a/webmentions_ssg/tasks/__init__.py b/webmentions_ssg/tasks/__init__.py
index 5af3987..62249ca 100644
--- a/webmentions_ssg/tasks/__init__.py
+++ b/webmentions_ssg/tasks/__init__.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2026 Dennis Fink <me+coding@dennisfink.me>
+#
+# SPDX-License-Identifier: BSD-3-Clause
+
 from .extension import Huey
 
 __all__ = ["Huey"]
diff --git a/webmentions_ssg/tasks/consumer.py b/webmentions_ssg/tasks/consumer.py
index 3bfe861..0f73529 100644
--- a/webmentions_ssg/tasks/consumer.py
+++ b/webmentions_ssg/tasks/consumer.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2026 Dennis Fink <me+coding@dennisfink.me>
+#
+# SPDX-License-Identifier: BSD-3-Clause
+
 from huey import Huey, crontab
 
 from .. import HUEY, create_app
diff --git a/webmentions_ssg/tasks/extension.py b/webmentions_ssg/tasks/extension.py
index 15bc669..95f190f 100644
--- a/webmentions_ssg/tasks/extension.py
+++ b/webmentions_ssg/tasks/extension.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2026 Dennis Fink <me+coding@dennisfink.me>
+#
+# SPDX-License-Identifier: BSD-3-Clause
+
 from functools import wraps
 from typing import Any, Callable
 from urllib.parse import urlsplit, urlunsplit
diff --git a/webmentions_ssg/tasks/receiver.py b/webmentions_ssg/tasks/receiver.py
index 4aba3d8..c33f517 100644
--- a/webmentions_ssg/tasks/receiver.py
+++ b/webmentions_ssg/tasks/receiver.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2026 Dennis Fink <me+coding@dennisfink.me>
+#
+# SPDX-License-Identifier: BSD-3-Clause
+
 import uuid
 from urllib.parse import urljoin
 
diff --git a/webmentions_ssg/tasks/scanner.py b/webmentions_ssg/tasks/scanner.py
index fa6a47b..0cf038a 100644
--- a/webmentions_ssg/tasks/scanner.py
+++ b/webmentions_ssg/tasks/scanner.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2026 Dennis Fink <me+coding@dennisfink.me>
+#
+# SPDX-License-Identifier: BSD-3-Clause
+
 from collections.abc import Iterator
 from dataclasses import dataclass
 from datetime import UTC, datetime
diff --git a/webmentions_ssg/tasks/sender.py b/webmentions_ssg/tasks/sender.py
index 629c538..1d22ad9 100644
--- a/webmentions_ssg/tasks/sender.py
+++ b/webmentions_ssg/tasks/sender.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2026 Dennis Fink <me+coding@dennisfink.me>
+#
+# SPDX-License-Identifier: BSD-3-Clause
+
 import re
 import uuid
 from datetime import UTC, datetime
diff --git a/webmentions_ssg/templates/base.html b/webmentions_ssg/templates/base.html
index eb11b8e..1275391 100644
--- a/webmentions_ssg/templates/base.html
+++ b/webmentions_ssg/templates/base.html
@@ -1,3 +1,9 @@
+<!--
+SPDX-FileCopyrightText: 2026 Dennis Fink <me+coding@dennisfink.me>
+
+SPDX-License-Identifier: BSD-3-Clause
+-->
+
 {% from "bootstrap5/utils.html" import render_messages %}
 <!DOCTYPE html>
 <html lang="en" data-bs-theme="dark">
diff --git a/webmentions_ssg/templates/includes/confirmation_modal.html b/webmentions_ssg/templates/includes/confirmation_modal.html
index ff9bd06..5c0a5a1 100644
--- a/webmentions_ssg/templates/includes/confirmation_modal.html
+++ b/webmentions_ssg/templates/includes/confirmation_modal.html
@@ -1,3 +1,9 @@
+<!--
+SPDX-FileCopyrightText: 2026 Dennis Fink <me+coding@dennisfink.me>
+
+SPDX-License-Identifier: BSD-3-Clause
+-->
+
 <div class="modal fade"
      id="confirmation-modal"
      tabindex="-1"
diff --git a/webmentions_ssg/templates/login.html b/webmentions_ssg/templates/login.html
index e7d858c..9b9884e 100644
--- a/webmentions_ssg/templates/login.html
+++ b/webmentions_ssg/templates/login.html
@@ -1,3 +1,9 @@
+<!--
+SPDX-FileCopyrightText: 2026 Dennis Fink <me+coding@dennisfink.me>
+
+SPDX-License-Identifier: BSD-3-Clause
+-->
+
 {% extends "base.html" %}
 {% set title = "Login" %}
 {% from "bootstrap5/form.html" import render_form %}
diff --git a/webmentions_ssg/templates/received.html b/webmentions_ssg/templates/received.html
index 525e811..1c5a216 100644
--- a/webmentions_ssg/templates/received.html
+++ b/webmentions_ssg/templates/received.html
@@ -1,3 +1,9 @@
+<!--
+SPDX-FileCopyrightText: 2026 Dennis Fink <me+coding@dennisfink.me>
+
+SPDX-License-Identifier: BSD-3-Clause
+-->
+
 {% extends "base.html" %}
 {% from "bootstrap5/form.html" import render_form %}
 {% from "bootstrap5/pagination.html" import render_pagination %}
diff --git a/webmentions_ssg/templates/sent.html b/webmentions_ssg/templates/sent.html
index bc9e021..1d311a0 100644
--- a/webmentions_ssg/templates/sent.html
+++ b/webmentions_ssg/templates/sent.html
@@ -1,3 +1,9 @@
+<!--
+SPDX-FileCopyrightText: 2026 Dennis Fink <me+coding@dennisfink.me>
+
+SPDX-License-Identifier: BSD-3-Clause
+-->
+
 {% extends "base.html" %}
 {% from "bootstrap5/form.html" import render_form %}
 {% from "bootstrap5/pagination.html" import render_pagination %}
diff --git a/webmentions_ssg/templates/sent_source.html b/webmentions_ssg/templates/sent_source.html
index 8e5932c..6bb2ac5 100644
--- a/webmentions_ssg/templates/sent_source.html
+++ b/webmentions_ssg/templates/sent_source.html
@@ -1,3 +1,9 @@
+<!--
+SPDX-FileCopyrightText: 2026 Dennis Fink <me+coding@dennisfink.me>
+
+SPDX-License-Identifier: BSD-3-Clause
+-->
+
 {% extends "base.html" %}
 {% block content %}
   <div class="mb-3">
diff --git a/webmentions_ssg/templates/status.html b/webmentions_ssg/templates/status.html
index 451f26f..9140c95 100644
--- a/webmentions_ssg/templates/status.html
+++ b/webmentions_ssg/templates/status.html
@@ -1,3 +1,9 @@
+<!--
+SPDX-FileCopyrightText: 2026 Dennis Fink <me+coding@dennisfink.me>
+
+SPDX-License-Identifier: BSD-3-Clause
+-->
+
 {% extends "base.html" %}
 {% from "bootstrap5/utils.html" import render_icon %}
 {% block content %}
diff --git a/webmentions_ssg/url_security.py b/webmentions_ssg/url_security.py
index 9cd261e..716591c 100644
--- a/webmentions_ssg/url_security.py
+++ b/webmentions_ssg/url_security.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2026 Dennis Fink <me+coding@dennisfink.me>
+#
+# SPDX-License-Identifier: BSD-3-Clause
+
 import ipaddress
 from urllib.parse import urlsplit
 
diff --git a/webmentions_ssg/views.py b/webmentions_ssg/views.py
index 13e5086..eb2b372 100644
--- a/webmentions_ssg/views.py
+++ b/webmentions_ssg/views.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2026 Dennis Fink <me+coding@dennisfink.me>
+#
+# SPDX-License-Identifier: BSD-3-Clause
+
 import uuid
 from typing import cast
 from urllib.parse import urlsplit