feat(devops): improve Docker build caching and add dev workflow targets

- Optimize Dockerfile layer caching with --mount=type=cache for Go modules and npm
- Reorganize Dockerfile layers for better cache hit rates
- Improve .dockerignore organization with categorized comments
- Add Makefile targets: up, down, rebuild-app, restart, ps
- Enhance Makefile help output with categorized sections

Makefile

@@ -1,4 +1,4 @@
-.PHONY: help test test-integration test-all build build-force clean rebuild logs test-env-up test-env-down verify-guidelines verify-quick
+.PHONY: help test test-integration test-all build build-force clean rebuild rebuild-app restart up down logs ps test-env-up test-env-down verify-guidelines verify-quick
 
 # Include .env file for environment variables (single source of truth)
 # Ignore if .env doesn't exist yet
@@ -10,16 +10,30 @@ endif
 # Default target
 help:
 	@echo "Available targets:"
+	@echo ""
+	@echo "Development:"
+	@echo "  make up           - Start containers (if already built)"
+	@echo "  make build        - Build and start all containers"
+	@echo "  make rebuild-app  - Rebuild app container only (fast, for development)"
+	@echo "  make restart      - Restart app container (preserves db)"
+	@echo "  make down         - Stop all containers"
+	@echo "  make rebuild      - Clean, rebuild, and start all containers"
+	@echo "  make build-force  - Force rebuild without cache (slow, use if needed)"
+	@echo ""
+	@echo "Status & Logs:"
+	@echo "  make ps           - Show container status"
+	@echo "  make logs         - Show container logs (follow mode)"
+	@echo ""
+	@echo "Testing:"
 	@echo "  make test              - Run unit tests (from host, fast)"
 	@echo "  make test-integration  - Run integration tests (in containers, matches prod)"
 	@echo "  make test-all          - Run all tests (unit + integration)"
-	@echo "  make build             - Build and start containers"
-	@echo "  make build-force       - Force rebuild and start containers"
-	@echo "  make clean             - Stop and remove containers"
-	@echo "  make rebuild           - Clean, rebuild, and start containers"
-	@echo "  make logs              - Show container logs"
 	@echo "  make test-env-up       - Start containers with test mode enabled"
 	@echo "  make test-env-down     - Stop test environment"
+	@echo ""
+	@echo "Verification:"
+	@echo "  make verify-guidelines - Run comprehensive guidelines check"
+	@echo "  make verify-quick      - Run quick guidelines check"
 
 # Run unit tests locally (fast, no containers)
 test:
@@ -56,7 +70,7 @@ test-all: test test-integration
 build:
 	podman compose up --build -d
 
-# Force rebuild without cache
+# Force rebuild without cache (slow, use if needed)
 build-force:
 	podman compose build --no-cache
 	podman compose up -d
@@ -68,6 +82,30 @@ clean:
 # Clean rebuild (remove volumes, rebuild, start)
 rebuild: clean build
 
+# Quick start (if already built)
+up:
+	podman compose up -d
+
+# Stop all containers (alias for clean)
+down:
+	podman compose down
+
+# Rebuild app container only (fast, for development)
+rebuild-app:
+	@echo "Rebuilding app container only (database stays running)..."
+	podman compose up --build -d app
+	@echo "✓ App container rebuilt"
+
+# Restart app container (preserves database)
+restart:
+	@echo "Restarting app container (database stays running)..."
+	podman compose restart app
+	@echo "✓ App container restarted"
+
+# Show container status
+ps:
+	podman compose ps
+
 # Show container logs
 logs:
 	podman compose logs -f