Get Agent Execution Environment

Get resolved execution environment for an agent.

This endpoint:

1. Fetches agent’s execution_environment and environment_ids from database
2. Fetches and merges execution configs from all associated environments
3. Merges agent’s own execution_environment (agent config overrides environment)
4. Resolves all secret names to actual values
5. Resolves all integration IDs to actual tokens
6. Maps integration tokens to specific env var names
7. Returns merged env var dict

Inheritance order (later overrides earlier):

• Environment 1 execution_environment
• Environment 2 execution_environment
• …
• Agent execution_environment

Returns: Dict of environment variables ready to inject into agent execution