Add license file and improve CLAUDE.md context file

CLAUDE.md

@@ -2,9 +2,15 @@
 
 ## Version Management
 
-Any change to the repository content (code, configuration, documentation) should update the integration version in `custom_components/immich_album_watcher/manifest.json`.
+Update the integration version in `custom_components/immich_album_watcher/manifest.json` only when changes are made to the **integration content** (files inside `custom_components/immich_album_watcher/`).
+
+Do NOT bump version for:
+
+- Repository setup (hacs.json, root README.md, LICENSE, CLAUDE.md)
+- CI/CD configuration
+- Other repository-level changes
 
 Use semantic versioning:
 - **MAJOR** (x.0.0): Breaking changes
 - **MINOR** (0.x.0): New features, backward compatible
-- **PATCH** (0.0.x): Bug fixes, documentation updates
+- **PATCH** (0.0.x): Bug fixes, integration documentation updates

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 Alexei Dolgolyov
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.