Restore review-flagged comment content cut too aggressively in comment reduction

src/shell/persist/prune_fs.cpp

@@ -178,7 +178,7 @@ bool deleteOrphanFile(const std::string& absPath, bool& outUsedTrash,
         outUsedTrash = true;
         return true;  // deleted this call -> reclaimed
     }
-    // Distinguish "already absent" (nonzero return on some REAPER versions
+    // Distinguish "already absent" (nonzero return on some Windows/shell versions
     // for a vanished file) from a real failure so the caller can tally separately.
     std::error_code ec;
     if (!fs::exists(absPath, ec)) {

src/shell/persist/session.cpp

@@ -7,9 +7,11 @@
 //
 // classifyProjectTransition (pure, capture_paths) takes a `sameProjectObject`
 // bool so the decision stays REAPER-free and testable; poll() executes the
-// verdict. REAPER exposes no stable per-project GUID, so we mint one (genGuid/
-// guidToString) under kProjExtGuidKey; Save-As copies the whole .rpp including
-// our ext state, so the new project initially shares the old GUID, and poll()
+// verdict. REAPER exposes no stable per-project GUID (GetSetProjectInfo_String
+// has no PROJECT_GUID desc; GetProjectStateChangeCount is a session-local
+// counter, not cross-open identity), so we mint one (genGuid/guidToString)
+// under kProjExtGuidKey; Save-As copies the whole .rpp including our ext
+// state, so the new project initially shares the old GUID, and poll()
 // re-GUIDs it after relocating (or on the forked-sibling Load branch).
 //
 // Division of labour for undo/redo: the identity-transition poll (this file)

src/shell/persist/usage_scan.cpp

@@ -105,9 +105,10 @@ bool fxSubtreeHasInstance(const FxParmGetter& parm, int fxId,
     return false;
 }
 
-// Real-world FX containers are typically 2-4 levels deep; 32 is unreachable
-// in practice while remaining finite. The truncation->protect-all guard above
-// is the primary protection even at this depth.
+// Raised from 8 to 32 (defense in depth against truncation). Real-world FX
+// containers are typically 2-4 levels deep; 32 is unreachable in practice
+// while remaining finite. The truncation->protect-all guard above is the
+// primary protection even at this depth.
 constexpr int kMaxContainerDepth = 32;
 
 std::string trackFxParm(MediaTrack* tr, int fxId, const char* parm) {