[TomyFovos]

Summary

Routes canonical automatic checks for the TomyFovos fork through the existing Linux self-hosted runner while preserving hosted execution for upstream and OS-specific lanes.

Scope

• reusable E2E supports an explicit self-hosted lane
• fork PR workflow selects that lane
• mobile workflow selects self-hosted for same-repository fork changes
• upstream-only community tracking is guarded from the fork

Local validation

• git diff --check: PASS
• workflow YAML parse: PASS
• structural workflow assertions: PASS
• full suite: not run (CI infrastructure-only change; acceptance requires the automatic PR run)

Safety

• no changes were made in the live primary Orca worktree
• no upstream stablyai/orca mutation
• no merge requested by this PR creation