[GP2-S2] Projection From WAL Recovery

[flyingrobots]

Roadmap slice: GP2-S2
Goalpost: Goalpost 2: WAL Evidence Projection
Parent: #521
Related: #522

Source: docs/design/wal-wsc-durability-roadmap.md on branch cycle/521-wal-wsc-storage-relationship at bde7957c.

Scope

Parent issues: #521.

Scope:

• Build projection records from RecoveryScanReport, WAL manifests, segment
  seals, and recovery certificates.
• Support absent and obstructed postures without inventing evidence.

Acceptance:

• Recovery from a WAL root yields deterministic projection records.
• Missing manifests or unavailable locators produce typed projection
  obstruction, not empty success.
• Projection does not mutate WAL or graph storage.

Witness:

cargo test -p warp-core wal_projection_from_recovery

Dedupe note

This is the PR-sized implementation slice for the roadmap item above. Existing umbrella or adjacent issues remain linked as Parent/Related rather than duplicated here.

[coderabbitai]

🔗 Related PRs

#323 - Witnessed suffix admission evaluator [merged]
#379 - feat(core): commit runtime WAL ACK evidence [merged]
#389 - warp-wasm: add WARP DRIVE G2b query projection [merged]
#550 - Expose braid membership history [merged]
#551 - Finish braid historical membership and replay goalpost [merged]

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