Standardize LICENSE with SPDX header and add docs copyright footer

- Add YAML-formatted SPDX license metadata header to LICENSE
- Add copyright/trademark footer to docs/index.rst
- MIT license year based on first git commit (2011)

Note: This work was completed with AI assistance (Claude Code).

Author: oberstet

LICENSE

@@ -1,3 +1,34 @@
+---
+title: MIT License
+spdx-id: MIT
+source: https://opensource.org/license/mit/
+
+description: |
+  The MIT License is a short, permissive free software license.
+  It allows reuse within proprietary software provided all copies retain
+  the license terms. This project is distributed under the MIT License
+  by typedef int GmbH and Contributors.
+
+permissions:
+  - commercial-use
+  - modifications
+  - distribution
+  - private-use
+  - sublicense
+
+conditions:
+  - include-copyright
+  - include-license
+
+limitations:
+  - liability
+  - warranty
+
+held-by: typedef int GmbH and Contributors
+project: autobahn
+year: 2011
+---
+
 The MIT License (MIT)
 
 Copyright (c) typedef int GmbH and Contributors

docs/index.rst

@@ -25,3 +25,8 @@ Contents
    contributing
    OVERVIEW.md
    ai/index
+
+--------------
+
+*Copyright (c) typedef int GmbH. Licensed under the* `MIT License <https://github.com/crossbario/autobahn-python/blob/master/LICENSE>`__.
+*WAMP, Autobahn, Crossbar.io and XBR are trademarks of typedef int GmbH (Germany).*