feat(ingest): adopt llm-ingestion-okf as Door A implementation (first consumer)

Replace the local 391-line ingest implementation with a thin adapter over
the shared llm-ingestion-okf library (git-pinned dae0bd1a via Forgejo,
tool.uv.sources). The materialize() signature is preserved; error types are
now the library's typed hierarchy rooted in IngestError, re-exported from
the consumer seam.

- tests/test_ingest_adoption.py: new load-bearing seam tests (delegation,
  offline invariant — allow_network is never passed, error contract),
  detach-proven red twice.
- Golden suites (file + sql) pass UNCHANGED — byte-exact behaviour proven
  against the repo-local fixtures.
- 6 test files migrated to the library error hierarchy; escaping/typed-cell
  unit tests dropped (byte-bound by the ingest-edge.md golden, unit-owned by
  the library's own 189-test suite). Provenance stamp now asserted
  independently from the §5 rule.
- mypy override follow_untyped_imports for llm_ingestion_okf (no py.typed
  upstream yet — reported as a finding).

Suite: 386 passed; ruff + format + mypy --strict clean; shared/, examples/,
runs/s10/ and run_s10.py byte-untouched.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

pyproject.toml

@@ -6,9 +6,17 @@ readme = "README.md"
 requires-python = ">=3.10"
 dependencies = [
     "claude-agent-sdk>=0.2.111,<0.3",
+    "llm-ingestion-okf",
     "pydantic>=2",
 ]
 
+# Distribution channel (2026-07-16 decision, mirrors the library's B2 answer):
+# git pin against the public Forgejo repo — reproducible for every consumer of
+# this public repo, uv.lock pins the exact commit. Bump the rev to the release
+# tag once the library tags one.
+[tool.uv.sources]
+llm-ingestion-okf = { git = "https://git.fromaitochitta.com/open/llm-ingestion-okf.git", rev = "dae0bd1a2898b69f436a877538d67afd71e48ad8" }
+
 [dependency-groups]
 dev = [
     "pytest>=8",
@@ -30,5 +38,11 @@ target-version = "py310"
 [tool.mypy]
 strict = true
 
+# llm-ingestion-okf ships full inline type hints but (as of 0.1.0 @ dae0bd1a)
+# no py.typed marker; follow its inline types instead of degrading to Any.
+[[tool.mypy.overrides]]
+module = "llm_ingestion_okf.*"
+follow_untyped_imports = true
+
 [tool.pytest.ini_options]
 testpaths = ["tests"]