feat(model-server): add endpoint /about #2352

All 890 tests pass, 9 skipped in 11m 21s

155 files ±0 155 suites ±0 11m 21s ⏱️ +18s
899 tests ±0 890 ✅ ±0 9 💤 ±0 0 ❌ ±0
909 runs ±0 900 ✅ ±0 9 💤 ±0 0 ❌ ±0

Results for commit d49f434. ± Comparison against earlier commit 7689c7a.