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/RDEPUBReaderController+DataSource.swift

@@ -38,10 +38,6 @@ extension RDEPUBReaderController: RDReaderDataSource, RDReaderPageProvider, RDRe
                 readerView.currentPage < 0 || readerView.currentPage == pageNum
             ) && !readerView.isPageCurlTransitioning
             if resolvedPage == nil, shouldAllowSynchronousFallback {
-                RDEPUBBackgroundTrace.log(
-                    "LoadingPage",
-                    "sync fallback requested page=\(pageNum + 1) currentPage=\(readerView.currentPage + 1) totalKnown=\(pageCountOfReaderView(readerView: readerView))"
-                )
                 _ = runtime.prepareOnDemandChapter(
                     forAbsolutePageNumber: pageNum + 1,
                     allowSynchronousLoad: true
@@ -84,10 +80,6 @@ extension RDEPUBReaderController: RDReaderDataSource, RDReaderPageProvider, RDRe
                 guard let readerView, let contentView else { return }
                 readerView.updateSelectionPagingSuppression(for: contentView, isSuppressed: isSuppressed)
             }
-            RDEPUBBackgroundTrace.log(
-                "LoadingPage",
-                "configureLoading page=\(pageNum + 1) currentPage=\(readerView.currentPage + 1) totalKnown=\(pageCountOfReaderView(readerView: readerView)) hasMap=\(readerContext.bookPageMap != nil)"
-            )
             contentView.configureLoading(
                 pageNumber: pageNum + 1,
                 totalPages: pageCountOfReaderView(readerView: readerView),
@@ -369,15 +361,7 @@ extension RDEPUBReaderController: RDReaderDataSource, RDReaderPageProvider, RDRe
             }
         }
         let effectivePageNum = readerView.currentPage >= 0 ? readerView.currentPage : pageNum
-        RDEPUBBackgroundTrace.log(
-            "PageEvent",
-            "pageNum callback raw=\(pageNum + 1) effective=\(effectivePageNum + 1) previousCurrent=\(previousCurrentPage + 1) readerCurrent=\(readerView.currentPage + 1) totalPages=\(pageCountOfReaderView(readerView: readerView)) display=\(readerView.currentDisplayType)"
-        )
         if previousCurrentPage != readerView.currentPage, effectivePageNum != pageNum {
-            RDEPUBBackgroundTrace.log(
-                "PageEvent",
-                "pageNum callback aborted dueToCurrentPageMutation raw=\(pageNum + 1) effective=\(effectivePageNum + 1)"
-            )
             return
         }