fix(server): claim lifecycle with TTL for webhook event dedup

packages/server/drizzle/0084_processed_events_claim_lifecycle.sql

@@ -0,0 +1,14 @@
+-- Custom migration (drizzle-kit generate --custom).
+--
+-- `processed_events` predates drizzle-kit management: it was created by the
+-- hand-written 0003_feishu_adapter.sql and is intentionally absent from the
+-- drizzle schema snapshot (like the adapter_* tables), so a regular
+-- `drizzle-kit generate` cannot emit ALTERs for it. The declarative shape
+-- lives in src/db/schema/processed-events.ts for documentation parity.
+--
+-- Claim lifecycle for webhook event dedup (issue #317): rows gain a
+-- pending/done status plus an expiry for pending claims. Existing rows are
+-- backfilled to 'done' by the column default so they keep deduping.
+ALTER TABLE "processed_events" ADD COLUMN IF NOT EXISTS "status" text DEFAULT 'done' NOT NULL;--> statement-breakpoint
+ALTER TABLE "processed_events" ADD COLUMN IF NOT EXISTS "expires_at" timestamp with time zone;--> statement-breakpoint
+CREATE INDEX IF NOT EXISTS "idx_processed_events_status_expires" ON "processed_events" ("status","expires_at");

packages/server/drizzle/LATEST

@@ -1 +1 @@
-0083_tiresome_bucky
+0084_processed_events_claim_lifecycle