Give Small Production api a 0.5 GB RAM floor

[kriszerops]

Summary

• Same RAM floor as in update import.yaml minfree ram #4: Small Production api gets minRam: 0.5 / minFreeRamGB: 0.25 instead of the ~0.12 GB platform default that OOMs tsx migrate.
• Add minFreeRamGB: 0.25 on apidev (AI Agent + Remote CDE).
• HA Production worker minContainers 2 → 3; drop @js from the zcp buildFromGit; remove NODE_ENV from api / api-dev run env.

The TypeScript existsSync guard from #4 is already on main.

Test plan

• Confirm Small Production api import yaml has minRam: 0.5.
• After import (or a GUI scale to match), retry an api deploy and check migrate is not OOM-killed.