Orchestrate tiered task execution

Code-orchestrated port of /forge:run-task — resolve the task pipeline, drive eac

Run a single Forge task through its full plan→implement→review→approve→commit pipeline via a deterministic JS driver instead of the LLM orchestrator.

• · args object with workflow parameters

• · structured JSON with findings or results

Valid args; agent dispatch configured; schema validation enabled

• · Invalid or missing args
• · Agent dispatch error
• · Schema validation failure
• · Token budget exceeded
• · Barrier/gate failure

• · Structured output schemas
• · Multi-phase barriers
• · Adversarial verification
• · Specialized agent lenses