feat: remove all remaining guardrails — advisory governance across all layers

18 changes implementing full advisory philosophy:

1. Safety Head prompt: prevention mandate → advisory observation
2. Native Reasoning: Safety claims conditional on actual risk signals
3. File Tool: path scope advisory (log + proceed)
4. HTTP Tool: SSRF protection advisory (log + proceed)
5. File Size Cap: configurable (default unlimited)
6. PII Detection: integrated with AdaptiveEthics
7. Embodiment: force limit advisory (log, don't clamp)
8. Embodiment: workspace bounds advisory (log, don't reject)
9. API Rate Limiter: advisory (log, don't hard 429)
10. MAA Gate: GovernanceMode.ADVISORY default
11. Physics Authority: safety factor advisory, not hard reject
12. Self-Model: evolve_value() for experience-based value evolution
13. Ethical Lesson: weight unclamped for full dynamic range
14. ConsequenceEngine: adaptive risk_memory_window
15. Cross-Head Learning: shared InsightBus between heads
16. World Model: self-modification prediction
17. Persistent memory: file-backed learning store
18. Plugin Heads: ethics/consequence hooks in HeadAgent + HeadRegistry

429 tests passing, 0 ruff errors, 0 new mypy errors.

Co-Authored-By: Nakamoto, S <defi@defi-oracle.io>

tests/test_embodiment.py

@@ -101,7 +101,8 @@ class TestEmbodimentBridge:
         assert result.success
 
     @pytest.mark.asyncio
-    async def test_execute_workspace_bounds_violated(self) -> None:
+    async def test_execute_workspace_bounds_advisory(self) -> None:
+        """Workspace bounds violations are advisory — command proceeds."""
         actuator = SimulatedActuator(joint_ids=["j0"])
         bridge = EmbodimentBridge(
             actuator=actuator,
@@ -112,8 +113,7 @@ class TestEmbodimentBridge:
             trajectory=[TrajectoryPoint(joint_positions={"j0": 5.0}, time_from_start=1.0)],
         )
         result = await bridge.execute(cmd)
-        assert not result.success
-        assert "outside bounds" in result.error_message
+        assert result.success  # Advisory: proceeds despite bounds violation
 
     @pytest.mark.asyncio
     async def test_execute_no_actuator(self) -> None: