Add loop process docs and reusable run templates

docs/run-template/04-plan/README.md

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+# Step 4 Plan Template
+
+## Stage Plan
+1.
+2.
+3.
+
+## Validation / Retry
+- validation points:
+- retry rules:
+- fallback path:
+
+## Evaluation
+- judgement: pass / revise / fail
+- reason:
+- failure category: