-- 000: PostgreSQL extensions required
CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
CREATE EXTENSION IF NOT EXISTS "pg_trgm";       -- Trigram for fuzzy text search
CREATE EXTENSION IF NOT EXISTS "btree_gist";    -- For exclusion constraints
CREATE EXTENSION IF NOT EXISTS "citus" CASCADE;  -- Distributed tables (Citus for horizontal scaling)
-- Note: Citus extension requires Citus-enabled PostgreSQL image in production
-- In dev, this CREATE EXTENSION will silently fail if not available