Add Symlink and Hardlink Ex and Schema; Fix Schema for `season_monitored_threshold`

[Heavybullets8]

• Added symlink and hardlink options to action_type:

  • Updated documentation and configuration examples to include hardlink and symlink as valid options.
  • Included an inline comment warning that hardlink and symlink require source_dirs and destination_dir to be on the same filesystem (important for container users).

    action_type: copy # <- Options: copy, move, hardlink, symlink (Note: 'hardlink' and 'symlink' require "source_dirs" and "destination_dir" to be on the same filesystem)

• Updated Schema for season_monitored_threshold:

  • Added season_monitored_threshold to the schema with type number.
  • This fixes schema validation errors in the default config example.