ci: release workflow's test job needs --all-extras

The release workflow's ``test`` job synced with bare
``uv sync --frozen``, which doesn't install optional
dependencies. The ``[otel]`` extras carry every OpenTelemetry
package the observability test suites import; without them
pyright sees ``Unknown`` for every OTel-typed expression in
``tests/conformance/test_observability.py`` and
``tests/unit/test_observability_otel.py`` and fails the
``Type check (pyright)`` step (633 errors against the v0.5.0-rc1
tag's first run).

CI's ``test`` job already syncs with ``--all-extras`` so the
package's main CI passes; the release workflow needs the same
flag for parity. Build job stays on bare ``uv sync --frozen`` —
``uv build`` reads ``pyproject.toml`` directly and emits the
wheel without consulting installed deps, so optional extras
don't affect the build artifact.

``pytest.importorskip("opentelemetry.sdk.trace")`` skips the
OTel test modules at collection time when the extras aren't
installed, but pyright doesn't honor that guard — it still
type-checks the file and surfaces every missing-stub
expression. ``--all-extras`` is the simplest fix.

Author: chris-colinsky

.github/workflows/release.yml

@@ -33,8 +33,13 @@ jobs:
         with:
           enable-cache: true
 
+      # ``--all-extras`` matches ``ci.yml`` so the OTel-gated tests'
+      # imports resolve at type-check time. Without it pyright sees
+      # ``Unknown`` for every OTel-typed expression in
+      # ``tests/{conformance,unit}/test_observability*.py`` and the
+      # whole job fails (pyright doesn't honor pytest.importorskip).
       - name: Sync deps
-        run: uv sync --frozen
+        run: uv sync --frozen --all-extras
 
       # Fail fast if pyproject.toml's version doesn't match the pushed
       # tag. Both sides go through `packaging.version.Version` so PEP 440