PR #2309 added an early-return that 422'd uploads to external workspaces
with "file upload not supported." Both halves of that diagnosis were wrong:
1. External workspaces SHOULD support uploads — gating with 422
locks off intended functionality and labels it as design.
2. The 503 the user actually hit was on an INTERNAL workspace, not
an external one. The runtime check never even ran.
Real root cause (separate fix incoming):
- findContainer(...) requires a non-nil h.docker.
- In SaaS (MOLECULE_ORG_ID set), main.go selects the CP provisioner
instead of the local Docker provisioner — dockerCli is nil.
- findContainer short-circuits to "" → 503 "container not running"
on every workspace, internal or external, on Railway-hosted
SaaS where workspaces actually live on EC2.
This PR strips the misleading gate so #2308 can be re-investigated
against the real symptom. The proper fix routes the multipart upload
over HTTP to the workspace's URL when dockerCli is nil — tracked
as a follow-up.
Refs #2308.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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