-- Recreate provider_configs with per-instance id as PK
CREATE TABLE provider_configs_new (
  id            TEXT PRIMARY KEY,
  provider_type TEXT NOT NULL,
  config_json   TEXT NOT NULL,
  enabled       INTEGER NOT NULL DEFAULT 1,
  updated_at    TEXT NOT NULL
);
INSERT INTO provider_configs_new (id, provider_type, config_json, enabled, updated_at)
  SELECT provider_type, provider_type, config_json, enabled, updated_at
  FROM provider_configs;
DROP TABLE provider_configs;
ALTER TABLE provider_configs_new RENAME TO provider_configs;

-- Scope local_files_index entries by provider instance
ALTER TABLE local_files_index ADD COLUMN provider_id TEXT NOT NULL DEFAULT 'local';
CREATE INDEX IF NOT EXISTS idx_local_files_provider ON local_files_index(provider_id);