## Summary
- Replace deprecated `search.execute` with `search.memories` (hybrid mode) in `search_memories`
- Replace `memories.add` with `client.add` in tools and middleware
- Fix middleware `container_tag` param (was incorrectly `container_tags`)
- Fix profile memory deduplication for string and Pydantic API items
- Bump `supermemory>=3.50` and `requires-python>=3.9`
## Test plan
- [x] `uv run pytest tests/test_tools.py::TestMemoryOperationsUnit`
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