feat: add durable growth report schema

migrations/000002_growth_analyst.sql

@@ -0,0 +1,57 @@
+CREATE TABLE IF NOT EXISTS growth_reports (
+    id text PRIMARY KEY,
+    merchant_id bigint NOT NULL REFERENCES merchants(id),
+    terminal_id bigint REFERENCES terminals(id),
+    terminal_source_key text,
+    fingerprint text NOT NULL,
+    revision integer NOT NULL DEFAULT 1 CHECK (revision > 0),
+    status text NOT NULL CHECK (status IN ('QUEUED','ANALYZING','GENERATING','READY','PARTIAL','FAILED')),
+    horizon_days integer NOT NULL DEFAULT 90 CHECK (horizon_days = 90),
+    forecast_start_date date,
+    dataset_watermark text NOT NULL,
+    catalog_version text NOT NULL,
+    analytics_version text NOT NULL,
+    prompt_version text NOT NULL,
+    schema_version text NOT NULL,
+    model text NOT NULL,
+    deterministic_evidence jsonb NOT NULL DEFAULT '{}'::jsonb,
+    ai_response jsonb,
+    failure_code text,
+    input_tokens bigint NOT NULL DEFAULT 0 CHECK (input_tokens >= 0),
+    output_tokens bigint NOT NULL DEFAULT 0 CHECK (output_tokens >= 0),
+    latency_ms bigint NOT NULL DEFAULT 0 CHECK (latency_ms >= 0),
+    manual_refresh boolean NOT NULL DEFAULT false,
+    tehran_refresh_day date,
+    created_at timestamptz NOT NULL DEFAULT now(),
+    updated_at timestamptz NOT NULL DEFAULT now(),
+    completed_at timestamptz
+);
+-- statement-break
+CREATE UNIQUE INDEX IF NOT EXISTS growth_reports_current_fingerprint_idx
+    ON growth_reports (merchant_id, fingerprint)
+    WHERE manual_refresh = false AND status IN ('QUEUED','ANALYZING','GENERATING','READY','PARTIAL');
+-- statement-break
+CREATE UNIQUE INDEX IF NOT EXISTS growth_reports_daily_merchant_refresh_idx
+    ON growth_reports (merchant_id, tehran_refresh_day)
+    WHERE manual_refresh = true;
+-- statement-break
+CREATE INDEX IF NOT EXISTS growth_reports_scope_latest_idx
+    ON growth_reports (merchant_id, terminal_id, created_at DESC);
+-- statement-break
+CREATE INDEX IF NOT EXISTS growth_reports_pending_idx
+    ON growth_reports (created_at)
+    WHERE status IN ('QUEUED','ANALYZING','GENERATING');
+-- statement-break
+CREATE TABLE IF NOT EXISTS growth_report_idempotency (
+    merchant_id bigint NOT NULL REFERENCES merchants(id),
+    idempotency_key text NOT NULL,
+    request_hash text NOT NULL,
+    report_id text NOT NULL REFERENCES growth_reports(id) ON DELETE CASCADE,
+    created_at timestamptz NOT NULL DEFAULT now(),
+    PRIMARY KEY (merchant_id, idempotency_key)
+);
+-- statement-break
+CREATE INDEX IF NOT EXISTS growth_report_idempotency_created_idx
+    ON growth_report_idempotency (created_at);
+-- statement-break
+INSERT INTO schema_migrations(version) VALUES (2) ON CONFLICT DO NOTHING;