normalizePhaseName() strips any [A-Z][A-Z0-9_]*- prefix as a project code,
so a foreign-prefixed query like MEM-01 collapsed to 01 and resolved to
the unrelated numeric Phase 01 via the dir/roadmap fallback. Add a guard
in cmdInitPlanPhase: when the query carries a prefix that is not the
configured project_code, require exact prefixed evidence (a phase dir whose
token literally IS the prefixed query, or a roadmap entry literally headed
with it) before accepting a match; otherwise report phase_found:false.
The project_code's own prefixed phases pass through unchanged.
