Compatibility cleanup
Timer handle typings updated for canary compatibility
The only code change this week replaced hard-coded number timer IDs with ReturnType<typeof setTimeout> / setInterval or removed unnecessary annotations. This keeps async utilities, CLI spinner/progress helpers, cache TTL logic, and testing time mocks compatible with canary timer return types without affecting runtime behavior.
Other misc changes
Type-only cleanup and docs touchups
Minor type cleanups landed across async/*, cache/ttl_cache.ts, cli/*, testing/*, and toml/_parser_test.ts, plus a small testing/README.md example update.