[sodre]

Summary

#31 asks for boot and build times in the runbook's "Measured numbers" for each capacity the canary used. This adds the Rust matrix runs, repo-neutral:

 ## Measured numbers
   - Boot time …
   - Fargate Spot against EC2 Spot (the #28 spike) …
+  - A Rust test and mutation-test matrix: Fargate Spot ci-cpu-8 / ci-cpu-2 against EC2 Spot ci-cpu-8 / ci-cpu-4
   - vCPU quotas …
-    | Fargate Spot … | 140 | 6 | 24 | 0 |
+    | Fargate Spot … | 140 | 6 | 48 | 0 |

Evidence

• Before: the runbook had only the spike's single cold ruff build. Its quota table still gave the Fargate Spot budget default as 24.
• After: the four runs' numbers, checked against the runs' jobs JSON (one test and eight mutants jobs each, all green, identical mutation results). The table now says 48, matching template.yaml since 097cd81. make test passes (146).

Merge Danger

Door: two-way.

Blast Radius: docs only.

Part of #18. Closes #31; the two events it can't force move to #43.

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