fix(v10): wire self-healing runtime into compute and agent execution

[jayDevCodes]

Hardens the merged V10 self-healing architecture after integration review.

Changes:

• V10 repair path now uses the existing V9 causal diagnosis + program graph + runtime trace + repair memory.
• Repair-specific CognitiveComputePolicy now actually controls recursive worker compute.
• Worker tier override is enforced while independent judges remain frontier.
• V10 repair context carries failure signature, code-health inspection mode, compute budget, and prior repair evidence.
• Added integration regression tests for public V10 engine, repair policy/context, and stable-symbol inspection.
• MODEL_STATE now records V10 self-healing/fault-injection/stable-code capabilities and benchmark cases.

Production promotion remains validation-gated; this PR does not blindly modify production code.