All 10 TESS-M1 tasks merged to main (SEC-001..006 + M1-001/002/003 +
OBS-001); mark each done with PR/head/ROR evidence. TESS-M1-V set to
in-progress and owned by Mos (Mos runs the M1->M2 gate review directly
via its own independent non-author reviewer; orchestrator does not
dispatch a competing lane). Record the Mos-locked base=main convention.
Refs #707
