fix(migrations): sync email oauth tokens with init schema

db/migrations/0001_init.down.sql

@@ -15,6 +15,10 @@ DROP TABLE IF EXISTS bot_preauth_keys;
 DROP TABLE IF EXISTS bot_channel_configs;
 DROP TABLE IF EXISTS mcp_connections;
 DROP TABLE IF EXISTS bot_members;
+DROP TABLE IF EXISTS email_outbox;
+DROP TABLE IF EXISTS bot_email_bindings;
+DROP TABLE IF EXISTS email_oauth_tokens;
+DROP TABLE IF EXISTS email_providers;
 DROP TABLE IF EXISTS bots;
 DROP TABLE IF EXISTS memory_providers;
 DROP TABLE IF EXISTS model_variants;

db/migrations/0001_init.up.sql

@@ -492,6 +492,22 @@ CREATE TABLE IF NOT EXISTS email_providers (
   CONSTRAINT email_providers_name_unique UNIQUE (name)
 );
 
+-- email_oauth_tokens: stored OAuth2 tokens for Gmail email providers
+CREATE TABLE IF NOT EXISTS email_oauth_tokens (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  email_provider_id UUID NOT NULL UNIQUE REFERENCES email_providers(id) ON DELETE CASCADE,
+  email_address TEXT NOT NULL DEFAULT '',
+  access_token TEXT NOT NULL DEFAULT '',
+  refresh_token TEXT NOT NULL DEFAULT '',
+  expires_at TIMESTAMPTZ,
+  scope TEXT NOT NULL DEFAULT '',
+  state TEXT NOT NULL DEFAULT '',
+  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+CREATE INDEX IF NOT EXISTS idx_email_oauth_tokens_state ON email_oauth_tokens(state) WHERE state != '';
+
 -- bot_email_bindings: per-bot email provider binding with read/write/delete permissions
 CREATE TABLE IF NOT EXISTS bot_email_bindings (
   id UUID PRIMARY KEY DEFAULT gen_random_uuid(),