refactor(server): squash drizzle migrations 0000-0004 into single baseline
Generated by pnpm db:generate against the current schema.ts — replaces five historical migrations (0000_initial, 0001_clear_earthquake, 0002_peer_approval_requests, 0003_classy_loki, 0004_cooing_black_knight) with one baseline that matches the schema shape all five produced together. Pi + VM __drizzle_migrations rows will be rewritten per the Phase 2 surgery procedure before this deploys to either instance; DBs already match the new baseline, no DDL runs. Phase 1 audit verified no still-present bugs depend on any of the squashed migrations. Refs backlog #31 Phase 2.
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