Mission Run Overview
Mission Run: Read-Side Seam: Placement-Authority Closure
Move the 'which partition?' decision out of 34 call sites and into the one resolver that should own it, and guard the resolver nobody guards.
Where a mission's files live is supposed to be decided in one place, from the kind of file being read. In practice 34 call sites still decide it themselves by calling a location-specific helper, and one sibling helper is guarded by nothing at all. An audit proved the central resolver returns the same answer in every case tested — and a better answer for missions created before a recent rename. This mission moves those decisions into the resolver using a safe two-step refactor, guards the unguarded helper, closes two small related residuals, and corrects the records that misdescribed all of this.