Add secure error handling to prevent internal details leaking.
Changes:
- gateway/platforms/api_server.py:
- Add _handle_error_securely() function
- Logs full error details with reference ID internally
- Returns generic error message to client
- Updates all cron job exception handlers to use secure handler
CVSS: 7.5 (High)
Refs: V-013 in SECURITY_AUDIT_REPORT.md
CWE-209: Generation of Error Message Containing Sensitive Information