fix(coding-agents): route repository surveys explicitly

[TheAngryPit]

Summary

• Route the four canonical repository-survey documents through the survey strategy instead of generic document ingestion.
• Attach deterministic source:survey, harness, retain-attribution, and structural knowledge tags.
• Ground Component map, Core concepts, and Conventions page queries in their canonical survey evidence using repository-generic wording.
• Make sync status, crashed-survey retry detection, and completion-marker handling recognize source:survey while retaining compatibility with legacy source:upload banks.
• Keep the router's document IDs compile-time aligned with the survey producer's canonical SURVEY_DOC_IDS contract.

Root cause

hindsight_ingest_document treats every title as a generic uploaded document. The repository survey uses that public tool for four fixed findings, so vanilla ingestion classifies them as document / source:upload, while the seeded Knowledge Pages expect deterministic structural tags. Page population therefore depends on incidental extraction instead of the native survey contract.

Current-main refresh

This branch was rebuilt on current main (64ede361) instead of mechanically preserving the historical implementation. It keeps the current mission/template ownership model, current retain attribution, and the current client contract. It does not restore removed retain options or unrelated historical template changes.

Validation

Focused survey/router/readers
  104 tests passed

Full Coding Agents suite
  45 files passed, 493 tests passed

TypeScript --noEmit
  passed

Production build and declarations
  passed

Prettier and git diff --check
  passed

Independent review
  safe to merge; no blockers

No live Hindsight retain or page-refresh mutation was performed during this refresh. The earlier local data remediation is not part of this source PR.

Compatibility

• Non-survey hindsight_ingest_document calls retain document / source:upload behavior.
• Existing banks whose survey findings use source:upload remain supported.
• Existing user-owned missions are not overwritten.
• No server API, database schema, migration, dependency, or hook-configuration change.

[TheAngryPit]

Updated onto current main at 3a4b021 and resolved the retain-options conflict introduced by #3336: survey retains now use the current always-async client contract without the removed async option. I also rewrote the three seeded page queries to stay repository-generic while retaining deterministic anchors to the canonical survey documents; local repair, remediation, tag-repair, and harness-diagnosis wording is no longer part of the upstream queries. Fresh validation: focused routing/page/status/session tests 81/81; full Coding Agents suite 40 files and 412 tests; TypeScript noEmit and production build passed; diff check clean.