docs: scaffold polisher-control foundation

docs/02-v1-scope.md

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+# v1 Scope
+
+## In scope
+
+- Manual mode with live operator setpoints.
+- Full safety/interlock handling.
+- Host↔Teensy command/telemetry protocol.
+- KWR75B-CAN force/torque sensor integration.
+- Table and arm encoder acquisition.
+- ODrive S1 + M8325s spindle control/telemetry path.
+- Force actuator command path and tool-weight compensation.
+- Synchronized telemetry at >=100 Hz.
+- Manual-session logs and raw telemetry CSV.
+- USB SSD `/data/` storage layout.
+- `status.json` machine summary.
+- Controller-job validation path for future use.
+
+## Explicitly not in v1
+
+- Figuring strategy.
+- Metrology import/interpretation.
+- Calibration updates.
+- Autonomous optimization.
+- Powered Zero-G/admittance manipulation mode.
+- Remote control of the machine.
+- Multi-pass orchestration inside the controller.
+
+## First success condition
+
+A real manual polishing session can be run safely, and the resulting telemetry/logs are coherent enough for Antoine to analyze downstream.