fixed file not found issue regarding ssl

[Zedstron]

Initial Logs Analysis & Findings

• Added startup validation for SSL certificate files.
• Introduced checks for both cert/cert.pem and cert/key.pem.
• Added explicit error logging when certificate files are missing.
• Prevented application startup when SSL dependencies are unavailable.
• Added automatic creation of required runtime directories.

Generated Changes

SSL Validation

• Added os.path.isfile() checks for:
  • cert/cert.pem
  • cert/key.pem

Directory Initialization

• Added automatic creation for:
  • media/
  • media/audio/

Error Handling Improvements

• Added detailed logger output showing which certificate file is missing.
• Raised FileNotFoundError when SSL files are unavailable.
• Preserved traceback logging for easier debugging.

Runtime Stability

• Ensured required directories exist before launching uvicorn.
• Reused validated certificate paths in uvicorn.run().

QA Report

• Verified startup flow with valid SSL certificates.
• Verified application exits correctly when one or both cert files are missing.
• Verified media/ and media/audio/ directories are auto-created.
• Verified traceback logging remains intact during startup failures.

Security & Vulnerability Assessment

• Prevented accidental startup without SSL certificates.
• Reduced risk of insecure runtime configuration.
• Added safer filesystem initialization using exist_ok=True.
• No hardcoded secrets or sensitive information introduced.