Forge 2.7.26

Add autonomous Mission entrypoint and delivery-bound EP evidence (#155)

* Add bounded Mission controller and EP host-control criterion consumption

* Make SQLite installation backups self-contained after WAL copy

* Bind autonomous Mission delivery controls to approved EP capabilities

* Preserve Mission provenance at terminal readback and bound controller waits

* Require exact active EP grant and source identity before Mission start

* Reconcile accepted EP runs after grant loss without new work

* Bind optional delivered unittest observations to approved criteria

* Accept declared v1.1 observation capability over EP HTTP

* Require discovered tests for every optional unittest observation

* Accept versioned EP assurance profile grant readback

* Bind EP assurance policy digest in grant readback

* Support bounded Forge 2.7.26 same-schema installation

* Qualify published Forge 2.7.26 installation in opt-in test

* Allow next mission after quiescent failed planning attempt

* Reserve Forge 2.7.26 for Mission vertical slice

* Reject unsupported multi-scope installed Missions before intake

* Expose same-schema snapshot drift in installation test

* Validate EP constraint length before Mission intake

* Bound EP constraint count before Mission intake

* Wait briefly for EP terminal artifact publication

* Preserve distinct implementation and assurance candidates

* Continue existing approved successor after terminal assessment

* Anchor terminal artifact grace to actual run completion