Complete DeepSeek V4.1 station migration

[theFong]

Summary

• preserve the original glm-5.2 320k/no-vision contract while routing the alias to GLM-5.3
• add the pinned vLLM TP=2/PP=1 DeepSeek V4.1 runtime, paired lifecycle, rollback, recovery, qualification, and publication tooling
• add Weka-trace corpus/provenance validation, cache-controlled benchmark selection, long-context and feature acceptance
• add a repeatable limited-downtime Webster migration skill and reconcile retired Inkling recovery, OpenWebUI, and Prometheus state

Live publication acceptance is GO for /home/ubuntu/deepseek-v41-runs/20260911T075859Z. Both DeepSeek ranks remain unchanged with zero restarts; Baker was not modified.

Validation

• bash -n install.sh

• ./test.sh

• git diff --check

• go run github.com/rhysd/actionlint/cmd/actionlint@latest .github/workflows/bootstrap.yml

• python3 -m unittest discover -s webster/deepseek-v41/tests -p 'test_*.py' (143 passed)

• ./webster/deepseek-v41/scripts/sync-runbook.sh --check

• env -u SSH_AUTH_SOCK ./webster/deepseek-v41/scripts/acceptance.sh --run-root /home/ubuntu/deepseek-v41-runs/20260911T075859Z

• This change includes validation that would fail if the new behavior broke.

• Relevant success and failure paths are tested.

• Safe re-run/idempotency behavior is preserved.

• The supported GitHub Actions matrix passes.

Documentation

• User-facing documentation was updated, or no documentation change is needed.