SF Permits MCP Server

-- Add invite code tracking to users table -- Run against PostgreSQL: psql $DATABASE_URL -f scripts/add_invite_code.sql -- Idempotent: uses ADD COLUMN IF NOT EXISTS. -- invite_code: the code used at signup (NULL for pre-existing users) ALTER TABLE users ADD COLUMN IF NOT EXISTS invite_code TEXT; -- Index for cohort queries CREATE INDEX IF NOT EXISTS idx_users_invite_code ON users (invite_code) WHERE invite_code IS NOT NULL;