chore(deps): refresh dependencies with LiteLLM compatibility cap

[phernandez]

Why

uv sync --upgrade resolved LiteLLM 1.92.0, which replaced the universal Python wheel with a native Rust bridge. On macOS, uv falls back to the source distribution and the bundled PyO3 0.23.5 rejects Python 3.14.

The dependency refresh also upgrades ty, whose current default exits nonzero for advisory warnings as well as type errors.

What

• cap LiteLLM below 1.92.0 while Basic Memory supports Python 3.14
• lock LiteLLM 1.91.3, the latest compatible universal wheel
• retain the rest of the dependency refresh
• keep ty advisory diagnostics visible without making them fail the typecheck gate

Verification

• uv sync --upgrade
• clean frozen install under Python 3.14.5 with litellm==1.91.3 import
• uv lock --check
• uv run pytest tests/repository/test_litellm_provider.py test-int/semantic/test_litellm_live_harness.py -q — 32 passed
• just package-check
• just typecheck — passed with existing Python 3.14 asyncio deprecation warnings visible

Local gate notes

• just fast-check invalidated testmon after the environment refresh and entered the full suite. Semantic setup could not connect to the configured OrbStack Docker socket; representative later failures passed when rerun in isolation.
• just doctor completed the file-to-database, database-to-file, search, and embedding checks, then hit the existing cleanup guard that prevents deleting the only default project in an isolated configuration.