[MG_Backend] (P7): comment-only - the tally header names the macro that exists, and the def says the wire arm declines, not the draw

- WireDeclineTally.h cited `MGL_WIRE_DECLINE_FALSE`, which does not exist; the statement pair
  a site actually writes is `MGL_WIRE_DECLINE_AT(Site, "why", ...); return false;`, and the
  bare-Count sites stand under a W/E of their own, which the audit holds them to
- WireDeclines.def's banner said "EVERY WAY A MAGMA WIRE DRAW CAN DECLINE", contradicted by
  the header's "a decline is not always a skipped draw" paragraph: the Tex*/Shape*/Upload*
  rows count per texture sync, reached from the descriptor resolver, attachments,
  CopyTexSubImage, mipmap generation, CopyImageSubData and readback as well as from a draw.
  The banner now says the wire arm, and carries the per-sync sentence with a pointer to the
  header
- both files are disaggregated-only (the def is included only from the guarded header), and
  the edits are comments: the pull build's .text and symbol set are unchanged (G1)

MobileGL/MG_Backend/DirectVulkan/Renderer/WireDeclineTally.h

@@ -149,7 +149,9 @@ private:
 };
 
 // Every decline goes through this: the tally moves ALWAYS, the log line is once per site.
-// `return MGL_WIRE_DECLINE_FALSE(Site, "why", ...)` reads as the statement it replaces.
+// `MGL_WIRE_DECLINE_AT(Site, "why", ...); return false;` is the statement pair that replaces
+// a bare `return false;` (the few sites that call WireDeclineTally::Count directly stand
+// under an MGLOG_W/E of their own; scripts/ci/wire_declines_audit.py holds them to that).
 //
 // A DECLINE IS NOT ALWAYS A SKIPPED DRAW, so the line does not say "draw". The Tex*, Shape* and
 // Upload* rows are counted per texture SYNC: SyncTextureResourceByHandle is reached from the

MobileGL/MG_Backend/DirectVulkan/Renderer/WireDeclines.def

@@ -6,7 +6,13 @@
 // SPDX-License-Identifier: LGPL-3.0-only
 // End of Source File Header
 
-// P7 wave 2 package B3. THE NAMES OF EVERY WAY A MAGMA WIRE DRAW CAN DECLINE.
+// P7 wave 2 package B3. THE NAMES OF EVERY WAY THE MAGMA WIRE ARM CAN DECLINE.
+//
+// A DECLINE IS NOT ALWAYS A SKIPPED DRAW. The SetupWireDraw / DispatchWireCompute rows are one
+// per refused draw or dispatch; the Tex* / Shape* / Upload* rows are counted per texture SYNC,
+// which the draw path reaches once per sampled texture and the descriptor resolver, framebuffer
+// attachments, CopyTexSubImage, mipmap generation, CopyImageSubData and texture readback reach
+// on their own (WireDeclineTally.h, above MGL_WIRE_DECLINE_AT).
 //
 // CONTRACT-P7 §0 rule I says a refusal on the wire arm is either a named decline or a named
 // Fatal. Before B3 the draw path had a third shape the rule does not admit: a bare