#355 Add comments to the cache reservation API messages Pull request opened by hamersaw TL;DR Small PR to add comments on the catalog reservation API. Type ☐ Bug Fix ☑︎ Feature ☐ Plugin Are all requirements met? ☑︎ Code completed ☑︎ Smoke tested ☐ Unit tests added ☑︎ Code documentation added ☐ Any pending items have an associated Issue Complete description ^^^ Tracking Issue NA Follow-up issue NA flyteorg/flyteidl ✅ All checks have passed 13/13 successful checks