feat(drafts): add bot_drafts schema, automatic table bootstrap, and sync REST endpoints

sql/migration.sql

@@ -625,4 +625,22 @@ CREATE TABLE IF NOT EXISTS audit_log (
     details     JSONB       NOT NULL DEFAULT '{}'
 );
 
+-- ---------- BALE BOT DRAFTS (quote extraction & review sync) ----------
+CREATE TABLE IF NOT EXISTS bot_drafts (
+    id                  UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    chat_id             BIGINT NOT NULL,
+    kind                VARCHAR(16) NOT NULL,
+    payload             JSONB NOT NULL DEFAULT '{}'::jsonb,
+    missing             JSONB,
+    status              VARCHAR(16) NOT NULL DEFAULT 'active',
+    source              VARCHAR(16),
+    review_message_id   BIGINT,
+    last_bale_update_at TIMESTAMPTZ,
+    created_at          TIMESTAMPTZ NOT NULL DEFAULT now(),
+    updated_at          TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+CREATE INDEX IF NOT EXISTS ix_bot_drafts_chat_id ON bot_drafts(chat_id);
+CREATE INDEX IF NOT EXISTS ix_bot_drafts_chat_status ON bot_drafts(chat_id, status);
+
 COMMIT;