[CI, MG_Test] (Disaggregated): enforce real Magma buffer consumers and complete pixel coverage

MobileGL/MG_Backend/Init.cpp

@@ -97,18 +97,10 @@ namespace MobileGL::MG_Backend {
         // rather than aborting.
         constexpr Bool kMGPipeP5eRunAheadReady = true;
 
-        // P5e (sb, ID-106). DirectGLES GAINS BIT 13 - the indexed buffer binding points - and
-        // Magma deliberately does not. c0e landed the phase constant and the dirty-bit map with
-        // this row still reading P4a's mask, because withholding a consumer bit is the safe
-        // direction while no emitter exists: the client's R-8 gate then keeps the whole family
-        // on the legacy pull path. The moment ShaderBufferEmit.h's wired constant leaves 0 the
-        // two have to move together, so they are one commit.
-        //
-        // DIRECTVULKAN STAYS ON P4a's MASK. The bit says "this server reads set_shader_buffers
-        // instead of walking the client's binding-point table", and Magma's UniformManager does
-        // no such thing - it has no binding-point records at all, and P5e leaves it lockstep
-        // (CONTRACT-P5E.md §6). Claiming the bit there would make the client emit a family
-        // nothing consumes, which is ID-39's failure with a different family's name on it.
+        // The Magma transport now owns buffer stores and consumes their vertex,
+        // index and shader binding records. Both backends publish the resource
+        // family only alongside a real op table (checked below). This does not
+        // publish kCapRunAheadApply: Magma keeps its existing lockstep contract.
         Uint64 ConsumedSubsystemsFor(BackendType type) {
             switch (type) {
             case BackendType::DirectGLES: return MG_Pipe::kMGPipeSubsystemsMigratedAtP5e;