Corrections (#31):
- Add 010_corrections.sql migration (from cf-core CORRECTIONS_MIGRATION_SQL)
- Wire make_corrections_router() at /api/corrections (shared_db, product='snipe')
- get_shared_db() dependency aggregates corrections across all cloud users
Community module (#32#33):
- Init SnipeCommunityStore at startup when COMMUNITY_DB_URL is set
- Graceful skip if COMMUNITY_DB_URL is unset (local mode, community disabled)
- add_to_blocklist() publishes confirmed_scam=True seller_trust signal to
community postgres on every manual blocklist addition (fire-and-forget)
- BlocklistAdd gains flags[] field so active red-flag keys travel with signal
cf-orch community postgres (cf-orch#36) + cf-core module (cf-core#47) both merged.
