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/ReaderView/RDReaderView+PageCurl.swift

@@ -97,10 +97,6 @@ extension RDReaderView: UIPageViewControllerDataSource, UIPageViewControllerDele
 
     public func pageViewController(_ pageViewController: UIPageViewController, didFinishAnimating finished: Bool, previousViewControllers: [UIViewController], transitionCompleted completed: Bool) {
         let resolvedPage = (pageViewController.viewControllers?.first as? RDReaderPageChildViewController)?.pageNum ?? -1
-        RDEPUBBackgroundTrace.log(
-            "PageCurl",
-            "didFinishAnimating finished=\(finished) completed=\(completed) resolvedPage=\(resolvedPage + 1) currentPageBeforeFinish=\(currentPage + 1)"
-        )
         if completed, let firstVC = pageViewController.viewControllers?.first as? RDReaderPageChildViewController {
             let pn = firstVC.pageNum
             if pn != RDReaderView.blankPageNum && pn != RDReaderView.blankEndPageNum {
@@ -119,17 +115,9 @@ extension RDReaderView: UIPageViewControllerDataSource, UIPageViewControllerDele
         if let target = pendingViewControllers.first as? RDReaderPageChildViewController,
            target.pageNum != RDReaderView.blankPageNum,
            target.pageNum != RDReaderView.blankEndPageNum {
-            RDEPUBBackgroundTrace.log(
-                "PageCurl",
-                "willTransitionTo targetPage=\(target.pageNum + 1) currentPage=\(currentPage + 1)"
-            )
             predictedPageDirection = target.pageNum >= currentPage
             primePageCache(around: target.pageNum, preferredForward: predictedPageDirection)
         } else {
-            RDEPUBBackgroundTrace.log(
-                "PageCurl",
-                "willTransitionTo blank target currentPage=\(currentPage + 1)"
-            )
         }
     }
 }