Allow any configuration value to be defined in any file

[Callum027]

Change the initial per-file validation of configuration files into a non-validating parsing and expansion of LocalPath attributes based on the dynamically generated Pydantic model.

This allows validation of only LocalPath type attributes while not validating anything else until the combined configuration structure is loaded properly.

With this change, the limitation where individual configuration files need to be syntatically correct on its own has now been lifted. The combined files being loaded, as a set, being correct is sufficient.

[Callum027]

Tested working.

buildarr.yml:

---

includes:
  - sonarr.yml
  - radarr.yml
  - prowlarr.yml
  - jellyseerr.yml
  - config2/buildarr-2.yml 

buildarr:
  watch_config: false  # Tell Buildarr to reload using SIGHUP.
  update_days:
    - "monday"
    - "tuesday"
    - "wednesday"
    - "thursday"
    - "friday"
    - "saturday"
    - "sunday"
  update_times:
    - "03:00"
  request_timeout: 30
  # secrets_file_path: "secrets.json"

config2/buildarr-2.yml:

---

buildarr:
  secrets_file_path: "secrets2.json"

prowlarr.yml (excerpt):

---

includes:
  - config2/prowlarr-2.yml

prowlarr:
  instances:
    prowlarr:
      api_key: <snip>
      settings:
        indexers:
          indexers:
            definitions:
              "Nyaa.si":
                type: nyaasi
                enable: true
                sync_profile: Standard
                redirect: false
                priority: 15
                grab_limit: 50  # 104
                query_limit: 10010
                tags:
                  - shows
                  - movies
                  - anime-shows
                  - anime-movies
                fields:
                  torrentBaseSettings.seedRatio: null
                  prefer_magnet_links: true

config2/prowlarr-2.yml:

---

prowlarr:
  instances:
    prowlarr:
      settings:
        indexers:
          indexers:
            definitions:
              "Nyaa.si":
                # The following are normally required, but not defined in the included file, to demonstrate the changes work.
                # type: nyaasi
                # sync_profile: Standard
                grab_limit: 104

buildarr test-config debug output: buildarr_test-config.log