debug: add start() method logs to confirm controller initialization

Added initial logs to show:
- When start() is called
- Whether already loaded (and skipped)

This helps confirm the controller is even being initialized.

src/services/readingProgressController.ts

@@ -175,8 +175,11 @@ class ReadingProgressController {
     const { relayPool, eventStore, pubkey, force = false } = params
     const startGeneration = this.generation
 
+    console.log('[readingProgress] start() called for pubkey:', pubkey.slice(0, 16), '...', 'force:', force)
+
     // Skip if already loaded for this pubkey and not forcing
     if (!force && this.isLoadedFor(pubkey)) {
+      console.log('[readingProgress] Already loaded for pubkey, skipping')
       return
     }