#409 Add pickle metadata to blob literal Pull request opened by pingsutw TL;DR propeller can use this metadata to know how many pods to launch in the map task. 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 How did you fix the bug, make the feature etc. Link to any design docs etc Tracking Issue NA Follow-up issue NA flyteorg/flyteidl ✅ All checks have passed 13/13 successful checks