Refactor downloader and file manager for improved rclone integration and add healthcheck and smoke test options

- Renamed download flags in ContentDownloader for clarity.
- Enhanced FileManager with methods to build upload paths and verify existing files for rclone uploads.
- Updated StreamProcessor to return success status for stream processing.
- Added rclone smoke test and healthcheck functions to validate configuration and tool availability.
- Improved environment variable handling with a utility function.
- Updated TwitchArchive to incorporate new rclone verification and processing logic.
- Added unit tests for new functionality and refactored existing tests for clarity and coverage.

Co-authored-by: Copilot <copilot@github.com>

docker-compose.yml

@@ -0,0 +1,28 @@
+services:
+  twitch-archive:
+    image: ${TWITCH_ARCHIVE_IMAGE:-forgejo.maddoscientisto.net/maddo/twitch-archive:latest}
+    container_name: ${TWITCH_ARCHIVE_CONTAINER_NAME:-twitch-archive}
+    restart: unless-stopped
+    init: true
+    env_file:
+      - ${TWITCH_ARCHIVE_APP_ENV_FILE:-./.env.production}
+    environment:
+      PYTHONUNBUFFERED: ${PYTHONUNBUFFERED:-1}
+      TZ: ${TZ:-UTC}
+      RCLONE_CONFIG: ${TWITCH_ARCHIVE_RCLONE_CONFIG:-/app/config/rclone.conf}
+      TWITCH_ARCHIVE_HEALTHCHECK_STREAMER: ${TWITCH_ARCHIVE_HEALTHCHECK_STREAMER:-vinesauce}
+    command:
+      - sh
+      - -lc
+      - python twitch-archive.py ${TWITCH_ARCHIVE_ARGS:--u vinesauce}
+    volumes:
+      - ${TWITCH_ARCHIVE_ARCHIVE_BIND:-./archive}:/app/archive
+      - ${TWITCH_ARCHIVE_CONFIG_BIND:-./config}:/app/config
+    healthcheck:
+      test:
+        - CMD-SHELL
+        - python twitch-archive.py --healthcheck -u ${TWITCH_ARCHIVE_HEALTHCHECK_STREAMER:-vinesauce}
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 30s