[EPAC-2286]: IngestBillVersionText - persist clause-level version and diff payloads#810
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## What & why Post-implementation **architecture verification** of the *Bill diff backend completion* Project ([EPAC-2293](https://linear.app/riddimsoftware/issue/EPAC-2293/architecture-verification-for-bill-diff-backend-completion)). This is an `arch-team` Project Verification gate — not a PR review and not an implementation change. It scores the *merged* Project state on `origin/main` and records the result as a checked-in scorecard, mirrored to a Linear comment on EPAC-2293. Docs-only: adds `docs/architecture/bill-diff-backend-completion-verification-epac2293.md`. No application/backend code is touched (the issue's "no implementation PR / no code patching" constraint is preserved). ## Verdict **7.5 / 10.0 — Healthy (high pass).** No Cardinal Sin, no Hidden Dependency. What holds: - Dependency direction holds in both Go services (`domain` imports no use case/adapter/SDK; use cases depend on ports; `main.go` is the composition root). - Serving split is correct: `LoadBillVersionDiff` owns the 204-vs-404 policy, the handler is thin, the repository owns SQLite. - **Civic-content provenance is clean** — verbatim XML→clause text end-to-end, structural `change_type` only, honest `nil` Hansard anchors; no generated/summarized parliamentary text. - Deployment smoke distinguishes API Gateway 404 from app-level 404 — directly targeting the original regression. - OpenAPI + use-case catalog updated by the implementing PRs. Deductions (−2.5): Behavioral Leakage −1.0 + Catalog Drift −1.0 (clause-diff policy lives in the LEGISinfo source adapter, not the cataloged indexer use case) → **EPAC-2303**; Enforcement Gap −0.5 (bills SQLite artifact schema is an unverified cross-adapter contract; sparse served version metadata) → **EPAC-2304**. ## Reconstructed inputs Originally-named siblings EPAC-2283/2284 were re-scoped (still in Backlog). Actual merged work scored: EPAC-2286 (#810), EPAC-2298 (#814), EPAC-2287 (#811), EPAC-2299 (#815), EPAC-2288 (#812), EPAC-2285 (#817), EPAC-2289 (#818), via `git fetch origin main` + merged commits. ## Follow-ups filed (non-blocking, `arch`, est. 4) - [EPAC-2303](https://linear.app/riddimsoftware/issue/EPAC-2303) — Implement `ComputeBillVersionDiff` use case in the bills-indexer application layer. - [EPAC-2304](https://linear.app/riddimsoftware/issue/EPAC-2304) — Lock the bills SQLite artifact schema with a producer-to-consumer seam test. ## Verification evidence - Scope is docs-only (`git diff origin/main..HEAD --stat`: 1 file, +117). No Go/Swift/CI code changed, so no build or simulator run applies; `pr-build` covers the change. - EPAC-2293 attached to the *Bill diff backend completion* Project; scorecard comment posted on the issue. Release-Note: none (docs-only architecture verification record). Co-authored-by: riddim-developer-bot <developer-bot@riddimsoftware.com>
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Scope
Implement the producer-side data contract for
IngestBillVersionTextandComputeBillVersionDiffinbackend/bills-indexerto fetch and parse version text from LEGISinfo XML and compute/persist clause-level diff payloads in the SQLite database.This includes:
domain.BillVersionto trackTextHash(SHA-256 of XML content) andTextSourceURL(provenance link).<Section>tags (corresponding to clauses) recursively from LEGISinfo bill XMLs.bill_clause_diffstable with composite foreign keys.NULLdatabase fields) for one-version bills or bills with missing/unfetchable version text.docs/architecture/use-case-catalog.md.Testing notes
go test -v ./...inbackend/bills-indexerto check all tests (including new legisinfo parsing/diffing tests and sqlite database schema tests).TestParseBillXML), clause alignment diffing unit tests (TestDiffClauses), and use case case-coverage tests (TestBuildDiffsCasesfor multi-version, one-version, and missing-text).TestWriterCreatesBillsRelationalSchemato checktext_hash,text_source_url, andbill_clause_diffstable constraints and columns.Related issue