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>

uv.lock

@@ -463,6 +463,11 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/06/e6/42a475bfca683b0cd5366f6dd06580062b7e567bb8534d225c877c2f14f3/librt-0.12.0-cp314-cp314t-win_arm64.whl", hash = "sha256:bca1472acbd473eff61059b4409f802c5a1bcb4cd0344d06f939df9c4c125d40", size = 104282, upload-time = "2026-06-30T16:14:09.29Z" },
 ]
 
+[[package]]
+name = "llm-ingestion-okf"
+version = "0.1.0"
+source = { git = "https://git.fromaitochitta.com/open/llm-ingestion-okf.git?rev=dae0bd1a2898b69f436a877538d67afd71e48ad8#dae0bd1a2898b69f436a877538d67afd71e48ad8" }
+
 [[package]]
 name = "mcp"
 version = "1.28.1"
@@ -589,6 +594,7 @@ version = "0.1.0"
 source = { editable = "." }
 dependencies = [
     { name = "claude-agent-sdk" },
+    { name = "llm-ingestion-okf" },
     { name = "pydantic" },
 ]
 
@@ -602,6 +608,7 @@ dev = [
 [package.metadata]
 requires-dist = [
     { name = "claude-agent-sdk", specifier = ">=0.2.111,<0.3" },
+    { name = "llm-ingestion-okf", git = "https://git.fromaitochitta.com/open/llm-ingestion-okf.git?rev=dae0bd1a2898b69f436a877538d67afd71e48ad8" },
     { name = "pydantic", specifier = ">=2" },
 ]