Add TODO file with v1.1.0 artist filter enhancement

TODO.md

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+# TODO
+
+## v1.0.0 Release
+- [ ] Create GitHub release with notes
+- [ ] Test installation via HACS custom repository
+
+## Future Enhancements (v1.1.0+)
+
+### Artist Filter Parameter
+Add optional artist filter parameter to improve multi-part query accuracy.
+
+**Current approach (v1.0.0):**
+- Combine artist and song into query string: "Yellow Coldplay"
+- Relies on Spotify's search ranking algorithm
+- Works well via LLM prompt enhancement
+
+**Proposed enhancement (v1.1.0):**
+- Add `artist` parameter to `search_spotify` service
+- Apply artist filtering to search results
+- Example: `search_spotify(query="Yellow", type="track", artist="Coldplay")`
+
+**Benefits:**
+- More precise matching when multiple artists have songs with same name
+- Explicit artist filtering vs relying on search ranking
+- Better handling of edge cases
+
+**Implementation notes:**
+- Update `services.yaml` to add `artist` parameter (optional)
+- Update `search_spotify` function in `__init__.py` to apply artist filtering
+- Update function definition in Extended OpenAI Conversation
+- Consider backward compatibility - make parameter optional
+- Update documentation and examples
+
+**Trade-offs:**
+- Requires more specific parameter extraction from LLM
+- May reduce flexibility of natural language queries
+- Current combined query approach already works well for most cases