[Feature] Allow job configuration overrides on instance level

[heapoutofspace]

Adds support for instance-level job configuration overrides, allowing different Sonarr/Radarr instances to have different job settings.

The change has been implemented with the following goals in mind:

• Avoid adding unnecessary complexity or new concepts to the config file.
• Hide the implementation from the jobs themselves, by handling the override mechanism in the settings module.

Example

job_defaults:
  max_strikes: 3

jobs:
  remove_slow:
    min_speed: 100
  search_unmet_cutoff:
    min_days_between_searches: 7
    max_concurrent_searches: 1

instances:
  sonarr:
    - base_url: "http://sonarr-hd:8989"
      api_key: "key1"
      # Uses global settings

    - base_url: "http://sonarr-4k:8989"
      api_key: "key2"
      jobs:
        remove_slow:
          min_speed: 500  # Override for this instance
        search_unmet_cutoff: false  # Disable for this instance

AI Assistance

While the code itself has been written by hand, some of the documentation and unit tests were generated by Claude Code and then manually verified.