Remove all RDEPUBBackgroundTrace.log and bare print diagnostic calls

Keep only the evaluateFullPageMapTakeover: fullReplace diagnostic log
in RDEPUBPageMapReconciliationCoordinator.swift for future debugging.

Simplified RDEPUBBackgroundTrace to just the log method (removed measure
and debug gating). Removed all [EPUB][...], [ReadViewDemo], and
[EPUB][Pagination] print statements across the project.

Also includes earlier bug fixes:
- Fix stale currentPageNumber in extendPartial commit
- Fix pageCurl rebindVisiblePage during transition
- Fix keepCurrentWindow not removing pending update from queue
- Fix right-aligned text (巫鸿 bug) via avoidPageBreakInside,
  tail merger, and continuation paragraph normalization
- Add text-indent reset for aligned blocks in CSS compatibility layer

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

Sources/RDReaderView/EPUBTextRendering/BuildPipeline/RDEPUBChapterTailNormalizer.swift

@@ -22,10 +22,6 @@ struct RDEPUBChapterTailNormalizer {
                     previous.diagnostics.append(note)
                     compacted.append(previous)
                 } else {
-
-                    #if DEBUG
-                    print("[EPUB][Pagination] href=\(href) dropped leading/intermediate whitespace frame \(NSStringFromRange(frame.contentRange))")
-                    #endif
                 }
                 continue
             }
@@ -41,9 +37,6 @@ struct RDEPUBChapterTailNormalizer {
                 previousFrame.diagnostics.append(note)
                 normalized.append(previousFrame)
             } else {
-                #if DEBUG
-                print("[EPUB][Pagination] href=\(href) dropped trailing frame \(NSStringFromRange(lastFrame.contentRange))")
-                #endif
             }
         }