optz: Goal orchestrator

docs/diagrams/goal-model-interaction.mmd

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+sequenceDiagram
+  participant O as Goal Orchestrator
+  participant L as Local Worker
+  participant S as H4 Security
+  participant C as Cloud Reviewer
+  participant A as H5 Audit
+
+  O->>L: Objective and governed context
+  L-->>S: Primary proposal
+  S->>C: Safe draft for independent review
+  C-->>O: Critique and refined outcome
+  O->>A: Certified final decision
+  A-->>O: Audit hash and status