feat: Add development scripts for environment check and service management

- check-env.sh: Validates Python 3.10+, Node.js, Docker, venv, .env, ports
- start-dev.sh: Starts MinIO, backend, frontend with health checks
- stop-dev.sh: Gracefully stops all services

Scripts are placed in project root for easy access.
Supports --help flag and colored output.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

openspec/specs/dev-scripts/spec.md

@@ -0,0 +1,123 @@
+# dev-scripts Specification
+
+## Purpose
+TBD - created by archiving change add-dev-scripts. Update Purpose after archive.
+## Requirements
+### Requirement: Environment Validation
+The check-env script SHALL validate all prerequisites required to run the development environment.
+
+#### Scenario: Check Python version
+- **WHEN** the check-env script runs
+- **THEN** the system SHALL:
+  - Verify Python 3.10 or higher is installed
+  - Display the detected Python version
+  - Exit with error if Python version is insufficient
+
+#### Scenario: Check Node.js and npm
+- **WHEN** the check-env script runs
+- **THEN** the system SHALL:
+  - Verify Node.js is installed (v18+ recommended)
+  - Verify npm is available
+  - Display detected versions
+
+#### Scenario: Check Docker availability
+- **WHEN** the check-env script runs
+- **THEN** the system SHALL:
+  - Verify Docker daemon is running
+  - Verify docker-compose is available
+  - Display Docker version
+
+#### Scenario: Check virtual environment
+- **WHEN** the check-env script runs
+- **THEN** the system SHALL:
+  - Verify venv/ directory exists
+  - Suggest creation command if missing: `python -m venv venv`
+
+#### Scenario: Check environment file
+- **WHEN** the check-env script runs
+- **THEN** the system SHALL:
+  - Verify .env file exists
+  - Suggest copying from .env.example if missing
+  - Warn if critical variables appear empty (FERNET_KEY)
+
+#### Scenario: Check port availability
+- **WHEN** the check-env script runs
+- **THEN** the system SHALL:
+  - Check if ports 8000, 3000, 9000, 9001 are available
+  - Display which ports are in use and by what process
+  - Warn but continue if ports are occupied
+
+### Requirement: Development Server Startup
+The start-dev script SHALL orchestrate the startup of all development services in the correct order.
+
+#### Scenario: Pre-flight validation
+- **WHEN** the start-dev script runs
+- **THEN** the system SHALL:
+  - Execute check-env.sh first
+  - Abort startup if critical checks fail
+
+#### Scenario: Start MinIO
+- **WHEN** start-dev begins service startup
+- **THEN** the system SHALL:
+  - Start MinIO using docker-compose -f docker-compose.minio.yml up -d
+  - Wait for MinIO health check to pass (up to 30 seconds)
+  - Display MinIO console URL (http://localhost:9001)
+
+#### Scenario: Start backend server
+- **WHEN** MinIO is healthy
+- **THEN** the system SHALL:
+  - Activate the virtual environment
+  - Install/update requirements if requirements.txt is newer than last install
+  - Start uvicorn in background: uvicorn app.main:app --reload --host 0.0.0.0 --port 8000
+  - Wait for backend to respond (up to 15 seconds)
+  - Display backend URL (http://localhost:8000)
+
+#### Scenario: Start frontend dev server
+- **WHEN** backend is healthy
+- **THEN** the system SHALL:
+  - Check if node_modules exists, run npm install if missing
+  - Start frontend dev server: npm run dev
+  - Display frontend URL (http://localhost:3000)
+
+#### Scenario: Display startup summary
+- **WHEN** all services are running
+- **THEN** the system SHALL:
+  - Display summary table with all service URLs
+  - Display log file locations
+  - Display instructions for stopping services
+
+#### Scenario: Handle graceful shutdown
+- **WHEN** user presses Ctrl+C during startup or operation
+- **THEN** the system SHALL:
+  - Trap the SIGINT signal
+  - Execute stop-dev.sh to clean up
+  - Display shutdown confirmation
+
+### Requirement: Development Server Shutdown
+The stop-dev script SHALL gracefully terminate all development services.
+
+#### Scenario: Stop frontend server
+- **WHEN** stop-dev script runs
+- **THEN** the system SHALL:
+  - Find and terminate the Vite dev server process
+  - Confirm termination or report if not running
+
+#### Scenario: Stop backend server
+- **WHEN** stop-dev script runs
+- **THEN** the system SHALL:
+  - Find and terminate the uvicorn process
+  - Confirm termination or report if not running
+
+#### Scenario: Stop MinIO
+- **WHEN** stop-dev script runs
+- **THEN** the system SHALL:
+  - Run docker-compose -f docker-compose.minio.yml down
+  - Preserve data volumes (do not use -v flag)
+  - Confirm MinIO container stopped
+
+#### Scenario: Display shutdown summary
+- **WHEN** all services are stopped
+- **THEN** the system SHALL:
+  - Display confirmation message for each service
+  - Report any services that failed to stop
+