feat: Add comprehensive dynamic configuration system v3.3.0

## Major Features Added

### 🎯 Dynamic Configuration System
- **Environment-aware model selection**: DEFAULT_MODEL with 'pro'/'flash' shortcuts
- **Configurable thinking modes**: DEFAULT_THINKING_MODE_THINKDEEP for extended reasoning
- **All tool schemas now dynamic**: Show actual current defaults instead of hardcoded values
- **Enhanced setup workflow**: Copy from .env.example with smart customization

### 🔧 Model & Thinking Configuration
- **Smart model resolution**: Support both shortcuts ('pro', 'flash') and full model names
- **Thinking mode optimization**: Only apply thinking budget to models that support it
- **Flash model compatibility**: Works without thinking config, still beneficial via system prompts
- **Dynamic schema descriptions**: Tool parameters show current environment values

### 🚀 Enhanced Developer Experience
- **Fail-fast Docker setup**: GEMINI_API_KEY required upfront in docker-compose
- **Comprehensive startup logging**: Shows current model and thinking mode defaults
- **Enhanced get_version tool**: Reports all dynamic configuration values
- **Better .env documentation**: Clear token consumption details and model options

### 🧪 Comprehensive Testing
- **Live model validation**: New simulator test validates Pro vs Flash thinking behavior
- **Dynamic configuration tests**: Verify environment variable overrides work correctly
- **Complete test coverage**: All 139 unit tests pass, including new model config tests

### 📋 Configuration Files Updated
- **docker-compose.yml**: Fail-fast API key validation, thinking mode support
- **setup-docker.sh**: Copy from .env.example instead of manual creation
- **.env.example**: Detailed documentation with token consumption per thinking mode
- **.gitignore**: Added test-setup/ for cleanup

### 🛠 Technical Improvements
- **Removed setup.py**: Fully Docker-based deployment (no longer needed)
- **REDIS_URL smart defaults**: Auto-configured for Docker, still configurable for dev
- **All tools updated**: Consistent dynamic model parameter descriptions
- **Enhanced error handling**: Better model resolution and validation

## Breaking Changes
- Removed setup.py (Docker-only deployment)
- Model parameter descriptions now show actual defaults (dynamic)

## Migration Guide
- Update .env files using new .env.example format
- Use 'pro'/'flash' shortcuts or full model names
- Set DEFAULT_THINKING_MODE_THINKDEEP for custom thinking depth

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

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

server.py

@@ -32,7 +32,7 @@ from mcp.server.stdio import stdio_server
 from mcp.types import ServerCapabilities, TextContent, Tool, ToolsCapability
 
 from config import (
-    GEMINI_MODEL,
+    DEFAULT_MODEL,
     MAX_CONTEXT_TOKENS,
     __author__,
     __updated__,
@@ -435,12 +435,16 @@ async def handle_get_version() -> list[TextContent]:
     Returns:
         Formatted text with version and configuration details
     """
+    # Import thinking mode here to avoid circular imports
+    from config import DEFAULT_THINKING_MODE_THINKDEEP
+
     # Gather comprehensive server information
     version_info = {
         "version": __version__,
         "updated": __updated__,
         "author": __author__,
-        "gemini_model": GEMINI_MODEL,
+        "default_model": DEFAULT_MODEL,
+        "default_thinking_mode_thinkdeep": DEFAULT_THINKING_MODE_THINKDEEP,
         "max_context_tokens": f"{MAX_CONTEXT_TOKENS:,}",
         "python_version": f"{sys.version_info.major}.{sys.version_info.minor}.{sys.version_info.micro}",
         "server_started": datetime.now().isoformat(),
@@ -453,7 +457,8 @@ Updated: {__updated__}
 Author: {__author__}
 
 Configuration:
-- Gemini Model: {GEMINI_MODEL}
+- Default Model: {DEFAULT_MODEL}
+- Default Thinking Mode (ThinkDeep): {DEFAULT_THINKING_MODE_THINKDEEP}
 - Max Context: {MAX_CONTEXT_TOKENS:,} tokens
 - Python: {version_info["python_version"]}
 - Started: {version_info["server_started"]}
@@ -486,7 +491,13 @@ async def main():
     # Log startup message for Docker log monitoring
     logger.info("Gemini MCP Server starting up...")
     logger.info(f"Log level: {log_level}")
-    logger.info(f"Using model: {GEMINI_MODEL}")
+    logger.info(f"Using default model: {DEFAULT_MODEL}")
+
+    # Import here to avoid circular imports
+    from config import DEFAULT_THINKING_MODE_THINKDEEP
+
+    logger.info(f"Default thinking mode (ThinkDeep): {DEFAULT_THINKING_MODE_THINKDEEP}")
+
     logger.info(f"Available tools: {list(TOOLS.keys())}")
     logger.info("Server ready - waiting for tool requests...")