docs: scaffold polisher-control foundation

docs/nick-generated/README.md

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+# Nick-Generated Notes
+
+This folder is for source-grounded technical notes Nick generates for Cédric.
+
+Rules:
+- technical-only;
+- no invoices/rates/private context/secrets;
+- mark generated notes `source_truth: false`;
+- if a note changes architecture, safety, telemetry contracts, protocol semantics, or v1 scope, ask Antoine before treating it as accepted.
+
+Suggested filename:
+
+```text
+YYYY-MM-DD-short-topic.md
+```