Added Documents Feature

backend/src/features/documents/migrations/001_create_documents_table.sql

@@ -0,0 +1,47 @@
+-- Documents feature schema
+-- Depends on vehicles table and update_updated_at_column() from vehicles feature
+
+CREATE TABLE IF NOT EXISTS documents (
+  id UUID PRIMARY KEY,
+  user_id VARCHAR(255) NOT NULL,
+  vehicle_id UUID NOT NULL REFERENCES vehicles(id) ON DELETE CASCADE,
+  document_type VARCHAR(32) NOT NULL CHECK (document_type IN ('insurance','registration')),
+  title VARCHAR(200) NOT NULL,
+  notes TEXT NULL,
+  details JSONB NULL,
+
+  storage_bucket VARCHAR(128) NULL,
+  storage_key VARCHAR(512) NULL,
+  file_name VARCHAR(255) NULL,
+  content_type VARCHAR(128) NULL,
+  file_size BIGINT NULL,
+  file_hash VARCHAR(128) NULL,
+
+  issued_date DATE NULL,
+  expiration_date DATE NULL,
+
+  created_at TIMESTAMP WITHOUT TIME ZONE DEFAULT NOW() NOT NULL,
+  updated_at TIMESTAMP WITHOUT TIME ZONE DEFAULT NOW() NOT NULL,
+  deleted_at TIMESTAMP WITHOUT TIME ZONE NULL
+);
+
+-- Update trigger for updated_at
+DO $$
+BEGIN
+  IF NOT EXISTS (
+    SELECT 1 FROM pg_trigger WHERE tgname = 'set_timestamp_documents'
+  ) THEN
+    CREATE TRIGGER set_timestamp_documents
+    BEFORE UPDATE ON documents
+    FOR EACH ROW
+    EXECUTE FUNCTION update_updated_at_column();
+  END IF;
+END $$;
+
+-- Indexes
+CREATE INDEX IF NOT EXISTS idx_documents_user_id ON documents(user_id);
+CREATE INDEX IF NOT EXISTS idx_documents_vehicle_id ON documents(vehicle_id);
+CREATE INDEX IF NOT EXISTS idx_documents_user_vehicle ON documents(user_id, vehicle_id);
+CREATE INDEX IF NOT EXISTS idx_documents_type ON documents(document_type);
+CREATE INDEX IF NOT EXISTS idx_documents_expiration ON documents(expiration_date);
+