feat: expose qualityReview via updateInitiativeConfig tRPC mutation

Adds qualityReview: z.boolean().optional() to the updateInitiativeConfig
input schema so the field passes through to the repository layer.
Includes integration tests verifying set-true, set-false, and
omit-preserves-existing round-trip behavior.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/server/trpc/routers/initiative.ts

@@ -221,6 +221,7 @@ export function initiativeProcedures(publicProcedure: ProcedureBuilder) {
         initiativeId: z.string().min(1),
         executionMode: z.enum(['yolo', 'review_per_phase']).optional(),
         branch: z.string().nullable().optional(),
+        qualityReview: z.boolean().optional(),
       }))
       .mutation(async ({ ctx, input }) => {
         const repo = requireInitiativeRepository(ctx);