Production readiness hardening and ops tooling

migrations/001_current_schema_bootstrap.mts

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+import type { ensureSchema } from "../src/shared/db/pool";
+
+export async function up(context: { ensureSchema: typeof ensureSchema }) {
+  await context.ensureSchema();
+}

migrations/002_export_jobs.sql

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+CREATE TABLE IF NOT EXISTS export_jobs (
+  id TEXT PRIMARY KEY,
+  job_type TEXT NOT NULL,
+  status TEXT NOT NULL DEFAULT 'pending' CHECK (status IN ('pending', 'running', 'completed', 'failed')),
+  requested_by TEXT,
+  request_json JSONB NOT NULL DEFAULT '{}'::jsonb,
+  result_content_type TEXT,
+  result_filename TEXT,
+  result_body TEXT,
+  error_message TEXT,
+  created_at TIMESTAMPTZ NOT NULL,
+  started_at TIMESTAMPTZ,
+  completed_at TIMESTAMPTZ
+);
+
+CREATE INDEX IF NOT EXISTS idx_export_jobs_status ON export_jobs (status, created_at DESC);

migrations/003_export_job_storage.sql

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+ALTER TABLE export_jobs
+  ADD COLUMN IF NOT EXISTS result_storage_path TEXT,
+  ADD COLUMN IF NOT EXISTS result_size_bytes INTEGER,
+  ADD COLUMN IF NOT EXISTS expires_at TIMESTAMPTZ;
+
+CREATE INDEX IF NOT EXISTS idx_export_jobs_expires_at ON export_jobs (expires_at);