feat(research): persist ranking observations

[hubab1]

Summary

• add an app-only, generation-safe ranking workflow for pre-live keyword research projects
• persist complete 200-result shared ranking crawls without creating fake tracked apps, tracked keywords, ranks, or refresh statuses
• make shared and tracked ranking persistence independently monotonic, deterministic, and rollback-safe
• rebuild shared keyword statistics in the owning transaction and schedule metadata enrichment only after a successful commit
• preserve App Store Web versus iTunes catalog, language, metadata, and rating provenance
• protect shared UI model contexts from committing or rolling back unrelated pending edits
• route the production coordinator-backed MCP persistence paths through the same full-result and post-commit rules

Safety and scope

• no schema change
• no credential or session handling
• no UI surface
• no live-store launch was performed because this stack inherits the manually gated V5 persistence work
• stale project/keyword incarnations, cancellation, provider failure, partial pages, delayed sources, equal retries, and batch rollback are covered

This is a stacked draft based on 32c-research-project-store / #48. It should remain draft until the persistence/provider stack receives maintainer approval. It progresses #3 but does not close it.

Validation

• 140 focused regression tests passed
• 374 full OpenASO tests passed
• signed Debug build passed
• codesign --verify --deep --strict passed
• project-file lint and whitespace checks passed
• independent final reviews found no remaining P0-P2 issues

Inherited limitation

The standalone OpenASOMCP scheme still has its pre-existing missing source-membership/type failures. This PR does not broaden into that separate repair; MCP behavior is covered through the main app/test scheme.