fix(wrap): declare pyyaml as a core dependency

`headroom wrap omp` lazily imports yaml to parse and merge omp's
models.yml registry, but pyyaml was never declared, so a bare
`pip install headroom-ai` (no extras) fails at wrap time with
ModuleNotFoundError. Dev and test environments masked this: pyyaml
arrives transitively through dev/ml extras (pre-commit, transformers).

CI surfaced it as the lint failure on the merge commit: the lint job
installs no project dependencies, so mypy flags the yaml import as
import-untyped (typeshed publishes stubs for it).

- pyproject.toml: add pyyaml>=6.0 to core dependencies
- uv.lock: surgically add pyyaml to the headroom-ai dependencies and
  requires-dist metadata (same approach as headroomlabs-ai#2011; a full `uv lock`
  regeneration would undo that PR's intel-mac torch guard)
- omp/runtime.py: annotate the import with type: ignore[import-untyped]
  following the psutil precedent (the lint env installs no deps)

Author: LunarECL

headroom/providers/omp/runtime.py

@@ -88,7 +88,7 @@ def inject_models_override(port: int, project: str | None = None) -> tuple[Path,
     * Any user-defined providers/models from the pre-wrap file are preserved:
       the override only deep-sets ``providers.anthropic.baseUrl``.
     """
-    import yaml
+    import yaml  # type: ignore[import-untyped]  # PyYAML ships no stubs; lint env installs no deps
 
     models_file = models_yml_path()
     backup = backup_path(models_file)

pyproject.toml

@@ -58,6 +58,7 @@ dependencies = [
     "rich>=13.0.0",               # Rich terminal output
     "opentelemetry-api>=1.24.0",  # Safe no-op OTEL API for instrumentation
     "ast-grep-cli>=0.30.0",       # AST-aware code slicing (CodeCompressor); binary wheel
+    "pyyaml>=6.0",                # omp wrap: parse/merge omp's models.yml registry
     "tomli>=2.0.0; python_version < '3.11'",  # tomllib backport for helper scripts
 ]