ECDT: integrate scenario engine with governed runtime

[aeonmatrixcommand-debug]

Integrates deterministic scenario evaluation with the governed
ECDT runtime while preserving the execution authority boundary.

Architecture:

Scenario Engine
|
v
Recommendation
|
v
Governed Scenario Integration
|
v
ECDT Runtime
|
+--> Policy
+--> Approval
+--> Execution Guard
+--> Execution Mode
+--> Explicit Executor
+--> Verification
+--> Learning

Safety / Governance:

• Scenario recommendation is not execution authority
• Integration has no execute/apply/deploy/promote interface
• Policy-blocked scenarios do not reach runtime
• Restricted actions still require human approval
• ExecutionGuard cannot be bypassed by recommendation
• EXECUTE mode still requires an explicit executor
• Missing action cannot trigger runtime execution
• Existing ECDTRuntime governance remains authoritative

Validation:

• Integration tests: 7 passed
• ECDT tests: 33 passed
• Full regression: 284 passed, 1 skipped
• git diff --check: passed
• Direct execution interface scan: NONE

Scope:

• src/intelligence/ecdt/init.py
• src/intelligence/ecdt/governed_scenario_integration.py
• tests/ecdt/test_governed_scenario_integration.py