v0.5.0

Minimum supported dependency versions are raised, which is a compatibility break
for downstreams, not a patch-level refresh.

Changed

• BREAKING: minimum supported dependency versions raised. These are floors, not just
  lockfile pins — installs that previously resolved will now fail to. Runtime dependencies:
  opentelemetry-{api,sdk,exporter-otlp} >=1.38 → >=1.44, pydantic >=2.12 → >=2.13.4,
  typing-extensions >=4.12 → >=4.16. Optional extras: opentelemetry-instrumentation-{fastapi,django,flask}

  =0.47b0 → >=0.65b0, pydantic-ai >=1.19 → >=2.22 (a major version of that project),
  structlog >=25.5 → >=26.1, ollama >=0.6.0 → >=0.6.2, httpx >=0.28.0 → >=0.28.1.
  Consumers pinned below any of these must upgrade before taking this release.
  Every floor is set to the latest release published at the time of the bump.

• Dev toolchain — pytest 9.1.1, pytest-asyncio 1.4.0, pytest-cov 7.1.0, ruff 0.16.1,
  mypy 2.3.0, fastapi 0.141.1, build 1.5.0, twine 7.0.0. Dev-only; no consumer impact.
• mypy hardening — warn_unused_ignores is now true. The previous false existed to keep
  version-dependent ignores valid across the 1.38–1.42 SDK typing change; raising the
  opentelemetry-sdk floor to 1.44 puts the whole supported range past that change, so the
  suppression is no longer needed. Removed two now-dead # type: ignore[no-untyped-call]
  comments in shutdown / init, and gave mcp._patch_mcp_class an explicit target: Any
  boundary for the dynamically-patched third-party class instead of two new inline ignores.
  Note this coupling: reverting the SDK floor to <1.42 requires reverting warn_unused_ignores too.

Internal

• CI now installs .[dev,all], so the optional extras' version floors are proven to resolve on
  every supported Python version (3.10–3.13) rather than going unexercised.
• CI lints the whole tree (ruff check .) instead of just src tests; examples/ and scripts/
  are exempted from ARG001 for the same reason tests/ already is — decorators supply
  ctx/payload arguments positionally, so demo signatures keep parameters their bodies ignore.