docs: scaffold polisher-control foundation

docs/01-ecosystem-boundaries.md

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+# Ecosystem Boundaries
+
+## polisher-sim
+
+Owns planning intelligence:
+- metrology ingestion;
+- mirror state and residuals;
+- removal prediction;
+- dwell/preset planning;
+- calibration and uncertainty;
+- campaign reports.
+
+## polisher-post
+
+Owns translation and validation:
+- schema validation;
+- machine capability checks;
+- unit normalization;
+- segmentation;
+- packaging `controller-job.v1`;
+- run-log normalization back into analysis format.
+
+## polisher-control
+
+Owns machine execution:
+- state machine;
+- manual mode;
+- setpoint execution;
+- force loop interface;
+- telemetry;
+- alarms/interlocks;
+- pause/resume/abort;
+- run/manual-session logs;
+- operator workflow.
+
+## Shared contracts
+
+Own schemas and names that must not drift silently:
+- `controller-job.v1`;
+- `run-log.v1`;
+- `manual-session-log.v1`;
+- `machine-capabilities.v1`;
+- telemetry channel names;
+- event/alarm codes.
+
+## Boundary rule
+
+If you are about to add planning, optimization, calibration, or metrology interpretation to this repo, stop and ask Antoine. That likely belongs upstream.