Simplify uptime calculation to always enforce minimum of 1 second,
even if time.Since returns exactly 0 (can happen on Windows with
coarse timing). This makes the test deterministic.
- Remove flaky MemoryAllocMB assertion that can be 0 due to GC timing on Linux CI
- Keep goroutine count check for basic validation
- Import latest issues from main with collision resolution
- Merge 13 duplicate issues created from parallel work into canonical versions
- Closes bd-100, bd-115, bd-230 (all same flaky test issue)
Amp-Thread-ID: https://ampcode.com/threads/T-50996f50-4b66-49ca-9db4-e1c3ef4d4bc3
Co-authored-by: Amp <amp@ampcode.com>