refactor(logging): reduce download log spam and set INFO level

- Pass app logger to yt-dlp so internal [download] progress lines
  are routed through the INFO-level logger instead of stdout.
- Throttle download_progress_handler debug logging to avoid
  flooding logs on every fragment tick.
- Switch key provider lifecycle messages to INFO (start/complete)
  while keeping verbose details at DEBUG.
- Set debug_enabled=False in development config so dev mode
  does not emit extra debug noise.
- Update config docstring example from DEBUG to INFO.

src/core/SeriesApp.py

@@ -445,9 +445,12 @@ class SeriesApp:
         try:
             def download_progress_handler(progress_info):
                 """Handle download progress events from loader."""
-                logger.debug(
-                    "download_progress_handler called with: %s", progress_info
-                )
+                # Throttle progress logging to avoid spam
+                status = progress_info.get("status", "")
+                if status in ("downloading", "finished"):
+                    logger.debug(
+                        "download_progress_handler called with: %s", progress_info
+                    )
 
                 downloaded = progress_info.get('downloaded_bytes', 0)
                 total_bytes = (

src/core/providers/aniworld_provider.py

@@ -331,6 +331,7 @@ class AniworldLoader(Loader):
                 'no_warnings': True,
                 'progress_with_newline': False,
                 'nocheckcertificate': True,
+                'logger': logger,
                 'progress_hooks': [events_progress_hook],
             }
 
@@ -339,7 +340,7 @@ class AniworldLoader(Loader):
                 logger.debug("Using custom headers for download")
 
             try:
-                logger.debug("Starting YoutubeDL download")
+                logger.info("Starting download: %s", output_file)
                 logger.debug("Download link: %s...", link[:100])
                 logger.debug("YDL options: %s", ydl_opts)
 

src/core/providers/enhanced_provider.py

@@ -566,6 +566,7 @@ class EnhancedAniWorldLoader(Loader):
                     "nocheckcertificate": True,
                     "socket_timeout": self.download_timeout,
                     "http_chunk_size": 1024 * 1024,  # 1MB chunks
+                    "logger": self.logger,
                 }
                 if headers:
                     ydl_opts['http_headers'] = headers

src/server/config/__init__.py

@@ -39,7 +39,7 @@ def get_settings() -> Union[DevelopmentSettings, ProductionSettings]:
     Example:
         >>> settings = get_settings()
         >>> print(settings.log_level)
-        DEBUG
+        INFO
     """
     if ENVIRONMENT in {"development", "testing"}:
         return get_development_settings()

src/server/config/development.py

@@ -215,7 +215,7 @@ class DevelopmentSettings(BaseSettings):
     @property
     def debug_enabled(self) -> bool:
         """Check if debug mode is enabled."""
-        return True
+        return False
 
     @property
     def reload_enabled(self) -> bool: