fix(tinycortex): key embeddings on the resolved provider slug - #15

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model: minimax/minimax-m3: model error: openai returned HTTP 402: Insufficient credits. Add more using <redacted>

The model gateway rejected every model in the fallback chain. This is usually credit, a per-key daily cap, or a provider outage — check the gateway's key status before re-running.

It blocks auto-merge on purpose: an unreviewed pull request must not be indistinguishable from a reviewed one. Re-run the review from the repository's Manual review workflow, or merge by hand if you have reviewed it yourself.