docs: document rust-log-analyzer

service-catalog/rust-log-analyzer/README.md

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+# Rust Log Analyzer
+
+[rust-log-analyzer] is a tool that analyzes the CI build logs of the [rust] repository to automatically extract error messages from failed builds.
+
+This tool is deployed via the [terraform/rust-log-analyzer] module as an ECS service and uses S3 to store the GitHub actions index.
+
+## Versions
+
+[rust-log-analyzer]: https://github.com/rust-lang/rust-log-analyzer
+[rust]: https://github.com/rust-lang/rust
+[terraform/rust-log-analyzer]: https://github.com/rust-lang/simpleinfra/tree/master/terraform/rust-log-analyzer