## Summary
Adds a load test metrics tool under
[`tools/loadtest/metrics/`](tools/loadtest/metrics/) for capturing and
comparing AWS CloudWatch metrics across Fleet load test runs.
- **`collect-metrics.sh`** — discovers a load test environment's AWS
resources from its Terraform workspace name, pulls CloudWatch metrics
over a lookback interval, and writes a `.json` data file plus a
human-readable `.md` synopsis (with threshold alerts). Supports a
`--category` flag (`baseline` | `migration` | `mdm`) that files output
under `runs/<category>/<workspace>/`.
- **`compare-metrics.sh`** — diffs two or more runs side by side and
flags deltas as `ok` / `WARN` / `ALERT`. Searches `runs/` recursively,
and `--filter` doubles as a category selector thanks to the naming
conventions.
- **`runs/`** — committed historical runs, organized by category:
`baseline/`, `migration/`, `mdm/`.
- New `README.md` documenting usage, run organization, and how to submit
results; linked from the root `tools/README.md`.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Added automated metrics tooling for AWS load-test environments —
collects ECS/RDS/Redis/ALB/network metrics, Performance Insights
top-SQL, CloudWatch Logs error samples, produces consolidated JSON +
Markdown summaries, and performs threshold checks with alerts.
* Added a metrics comparison tool to detect regressions across runs with
run selection, deduplication, per-metric comparisons, percent-change,
and aggregated alert synopsis.
* **Tests**
* Added numerous baseline and sample load-test metrics reports covering
multiple workspaces, intervals, and scenarios for validation and
regression analysis.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Andrey Kizimenko
23e96a7c73