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/EPUBUI/ReaderController/RDEPUBPresentationRuntime.swift

@@ -71,7 +71,6 @@ final class RDEPUBPresentationRuntime {
 
         guard !controller.isRepaginating else { return }
         guard !readerView.isPageCurlTransitioning else {
-            RDEPUBBackgroundTrace.log("PageMapCommit", "defer commit reason=pageCurlTransition")
             return
         }
 
@@ -226,18 +225,15 @@ final class RDEPUBPresentationRuntime {
 
             switch decision {
             case .keepCurrentWindow:
-                RDEPUBBackgroundTrace.log("Reconciliation", "decision: keepCurrentWindow — pending update removed to prevent indefinite retry")
                 removePendingPageMapUpdate(at: index)
                 return false
 
             case .fullReplace(let newPageMap):
-                RDEPUBBackgroundTrace.log("Reconciliation", "decision: fullReplace")
                 removePendingPageMapUpdate(at: index)
                 applyFullPageMapReplacement(newPageMap, readerView: readerView, controller: controller)
                 return true
 
             case .expandWindow, .segmentReplace:
-                RDEPUBBackgroundTrace.log("Reconciliation", "decision: unexpected segment decision")
                 removePendingPageMapUpdate(at: index)
                 return false
             }