chore: bump version to 0.2.5

Update version across all configuration files and documentation.

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

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/core/config.py

@@ -32,7 +32,7 @@ class Config(BaseSettings):
     
     # Application
     APP_NAME: str = "OpenAI-Compatible API"
-    APP_VERSION: str = "0.2.0"
+    APP_VERSION: str = "0.2.5"
     ENVIRONMENT: Environment = Environment.DEVELOPMENT
     DEBUG: bool = Field(default=False, description="Debug mode")