Make schema.sql idempotent for CI/CD migrations

Add IF NOT EXISTS to CREATE TABLE and CREATE INDEX statements.
Drop and recreate triggers to avoid errors on existing databases.

database/schema.sql

@@ -4,7 +4,7 @@
 CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
 
 -- Colors table
-CREATE TABLE colors (
+CREATE TABLE IF NOT EXISTS colors (
   id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
   name VARCHAR(100) NOT NULL UNIQUE,
   hex VARCHAR(7) NOT NULL,
@@ -15,7 +15,7 @@ CREATE TABLE colors (
 );
 
 -- Filaments table
-CREATE TABLE filaments (
+CREATE TABLE IF NOT EXISTS filaments (
   id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
   tip VARCHAR(50) NOT NULL,
   finish VARCHAR(50) NOT NULL,
@@ -32,9 +32,9 @@ CREATE TABLE filaments (
 );
 
 -- Create indexes for better performance
-CREATE INDEX idx_filaments_tip ON filaments(tip);
-CREATE INDEX idx_filaments_boja ON filaments(boja);
-CREATE INDEX idx_filaments_created_at ON filaments(created_at);
+CREATE INDEX IF NOT EXISTS idx_filaments_tip ON filaments(tip);
+CREATE INDEX IF NOT EXISTS idx_filaments_boja ON filaments(boja);
+CREATE INDEX IF NOT EXISTS idx_filaments_created_at ON filaments(created_at);
 
 -- Create updated_at trigger function
 CREATE OR REPLACE FUNCTION update_updated_at_column()
@@ -46,10 +46,12 @@ END;
 $$ language 'plpgsql';
 
 -- Apply trigger to filaments table
+DROP TRIGGER IF EXISTS update_filaments_updated_at ON filaments;
 CREATE TRIGGER update_filaments_updated_at BEFORE UPDATE
     ON filaments FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
 
 -- Apply trigger to colors table
+DROP TRIGGER IF EXISTS update_colors_updated_at ON colors;
 CREATE TRIGGER update_colors_updated_at BEFORE UPDATE
     ON colors FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();