chore(env): rename on_prem variable

To match existing naming on other apps and benefit from existing
auto-injection when deployed on premise.

chore: bump version

chore(version): bump

chore(version): bump

chore(version): bump

chore(version): Bump version

chore(bump): Release a new version

chore(bump): Bump version

chore(version): Bump version

fix(mcp): bump to 0.6.1

Patch release carrying the base-path-aware OAuth metadata routing
(single-domain self-hosted /mcp-server support).

Refs: SI-3474