MIGRATIONS: Sequence[str] = ["\nCREATE TABLE IF NOT EXISTS store (
\n -- 'prefix' represents the doc's 'namespace'\n prefix text NOT NULL,
\n key text NOT NULL,
\n value jsonb NOT NULL,
\n created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
\n updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
\n PRIMARY KEY (prefix, key)\n);\n", '\n-- For faster lookups by prefix\nCREATE INDEX CONCURRENTLY IF NOT EXISTS store_prefix_idx ON store USING btree (prefix text_pattern_ops);\n', '\n-- Add expires_at column to store table\nALTER TABLE store\nADD COLUMN IF NOT EXISTS expires_at TIMESTAMP WITH TIME ZONE,\nADD COLUMN IF NOT EXISTS ttl_minutes INT;\n', '\n-- Add indexes for efficient TTL sweeping\nCREATE INDEX IF NOT EXISTS idx_store_expires_at ON store (expires_at
)\nWHERE expires_at IS NOT NULL;\n']