feat(ingest): I3 — D7-speil av ingest (filkatalog/CSV), bygget fra commons-spec alene

Speiler MAF I2 fra shared/ingest-spec.md alene: manifest → CSV-konnektor →
materialisert OKF-bundle, byte-identisk med den delte golden-fasiten.

- ingest.py: ManifestContract (pydantic, fail-fast, file-kilde, verdict-reservasjon
  §3, id-grammatikk, max_rows), CSV-konnektor (boundary-checked fail-closed),
  materialisering (§5-frontmatter eksakt rekkefølge, markdown-tabell m/ escaping,
  LF-only, SHA-256 manifest-stamp), index-generering (§6), replacement §3/§5.
- okf.py: _parse_index_entry — tolererer frontmatterløs index (method-spec §3:
  index rendres via body = summary, ikke som typet concept-fil). Golden var
  spec-konform; D7-okf var strengere enn standarden. Scoped: non-index concept-
  filer krever fortsatt type (honesty-test).
- examples/ingest-golden-file/: repo-lokal golden (byte-frossen kopi av I2s fasit).
- Speiltester (I2s load-bearing-sett, alle detach-bevist røde): golden byte-fasit
  + mutasjonskontroller · provenance/navigability/verdict-reservasjon/re-ingest-safety
  · kontrakt fail-fast/max_rows/boundary/kollisjon · spec-integritet §11.
- docs/2026-07-04-I3-brief.md: brief + de to operatør-avgjorte beslutningene.

Suite 239 passed uten nøkkel/nettverk (189 + 50 nye) · ruff + mypy --strict rene.

[skip-docs] README + docs/extending.md er bevisst utsatt til I7 per sesjonsplan
(programmet batcher ingest-doc der, avgrenset til det D7 faktisk har — CSV nå,
SQL/HTTP senere). Endringen er dokumentert i docs/2026-07-04-I3-brief.md.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017MM6BWb1hWmJZuXFZ7rjxT

examples/ingest-golden-file/expected-bundle/index.md

@@ -0,0 +1,3 @@
+Golden extraction case: two CSV extracts from a local project archive (file source type).
+- [Project costs](ingest-costs.md)
+- [Escaping edge cases](ingest-edge.md)

examples/ingest-golden-file/expected-bundle/ingest-costs.md

@@ -0,0 +1,14 @@
+---
+type: dataset
+title: Project costs
+source_system: prosjekt-arkiv
+source_query: costs.csv
+ingested_at: 2026-07-03T12:00:00Z
+ingest_manifest: manifest@24109f486b9ef708
+generated: true
+---
+
+| item | cost_nok | note |
+| --- | --- | --- |
+| led-retrofit | 120000 | ROI under 2 years |
+| hvac-tuning | 80000 | requires vendor quote |

examples/ingest-golden-file/expected-bundle/ingest-edge.md

@@ -0,0 +1,18 @@
+---
+type: reference
+title: Escaping edge cases
+source_system: prosjekt-arkiv
+source_query: edge.csv
+ingested_at: 2026-07-03T12:00:00Z
+ingest_manifest: manifest@24109f486b9ef708
+generated: true
+---
+
+| id | value |
+| --- | --- |
+| backslash | a\\b |
+| pipe | a\|b |
+| newline | x y |
+| both | \\\| |
+| zeros | 007 |
+| decimal | 1.50 |