794ae7c1e7
M2.7 and M3 are two parallel configs, not a primary/fallback pair. Per user feedback, drop the language and any code that framed M2.7 as a rollback target for M3. - code-queue-supervision.md, microservices.md, windows-passthrough.md: remove 'default/fallback' labels; spell out that M2.7 and M3 are parallel, no auto-fallback, switching provider model is an explicit ops action. - scripts/src/code-queue.ts: modelTiers entries for M3 and M2.7 share the same 'simple-low-risk' risk; rename minimaxM2FallbackCandidate -> minimaxM27Candidate so the dry-run command string no longer implies fallback semantics. - scripts/code-queue-submit-routing-contract-test.ts: drop 'fallback' wording in assertions and the 'model registry fallback' check label. Refs: #189