refactor(progress): ProgressService required at construction; delete the 9 unreachable erase-fallbacks

Batch H1 step 3a. The ceiling census (exhaustive UpdateUniversalProgress
grep) found 9 nil-guarded `if progressSvc != nil { funnel } else { raw
erase-write }` fallbacks — the survey's "four" under-counted kobo.go,
which has FOUR sites (Markup ReadingSync, Markup last-read-place,
AnalyticsGettests, SyncFromServer), plus one each in media.go, queue.go
and koreader.go. All unreachable: the service is created unconditionally
at main.go:127 and wired into every handler and the queue processor; the
test harness wires them too.

The erasure pattern is now unrepresentable:
- NewMediaHandler / NewKOReaderHandler / NewKoboHandler / both
  NewSyncQueueProcessor flavors take the ProgressService as a REQUIRED
  constructor arg; the SetProgressService setters are gone.
- Every fallback body (raw UpdateUniversalProgress with explicit-NULL
  pgtypes for viewport/scroll/panel/reading_mode/zoom and no
  audio_offset_seconds/context_text) is deleted; each write funnels
  through SaveProgress with the LWW seed, so fields the writer doesn't
  know survive.
- Removed the now-dead koreader pg-type helpers (textPtrToPgText,
  intPtrToPgInt4, int64PtrToPgInt8) and their self-tests.

Behavior deltas (stored-row content, no wire shape changes —
KOReader/Kobo response pins stayed green):
- KOReader fallback used to write explicit NULL viewports and drop the
  context_text the koplugin sends; the funneled mainline already maps
  book.ContextText.
- Queue flushes no longer overwrite chapter_progress with the book
  percentage (bogus data; preserved via the seed).
- A web PUT without percentage no longer writes 0% via the deleted
  fallback; percentage seeds from the stored row.

Contract suite: KOReader×4 + Kobo×3 pins green.

cmd/server/tests/test_helpers_test.go

@@ -483,13 +483,11 @@ func setupTestServer(t *testing.T) *TestServerSetup {
 	progressService := wsync.NewProgressService(queries, connManager)
 	annotationService := wsync.NewAnnotationService(queries, connManager)
 
-	queueProcessor := wsync.NewSyncQueueProcessor(queries)
-	queueProcessor.SetProgressService(progressService)
+	queueProcessor := wsync.NewSyncQueueProcessor(queries, progressService)
 	queueCtx, queueCancel := context.WithCancel(context.Background())
 	go queueProcessor.Start(queueCtx)
 
-	koreaderHandler := handlers.NewKOReaderHandler(queries, connManager, queueProcessor)
-	koreaderHandler.SetProgressService(progressService)
+	koreaderHandler := handlers.NewKOReaderHandler(queries, connManager, queueProcessor, progressService)
 	koreaderHandler.SetAnnotationService(annotationService)
 	wsHandler := handlers.NewWSHandler(queries, connManager, cfg.JWTSecret, deviceAuthMiddleware)
 	conflictHandler := handlers.NewConflictHandler(queries, connManager)
@@ -510,8 +508,7 @@ func setupTestServer(t *testing.T) *TestServerSetup {
 	statisticsService := services.NewStatisticsService(queries)
 	statsHandler := handlers.NewStatsHandler(statisticsService)
 	seriesHandler := handlers.NewSeriesHandler(queries)
-	mediaHandler := handlers.NewMediaHandler(queries, libraryService, worker)
-	mediaHandler.SetProgressService(progressService)
+	mediaHandler := handlers.NewMediaHandler(queries, libraryService, progressService, worker)
 	mediaHandler.SetAnnotationService(annotationService)
 	matchingHandler := handlers.NewMatchingHandler(queries, connManager)