Update PocketBase bot and import workflow to use direct `notes` and `install_methods` fields instead of the older `notes_json`/`install_methods_json` relations. Adjust parsing, PATCH/POST payloads and error messages accordingly, remove project_url handling, and drop the separate resolution/creation of related note/install_method records in the import script. Also update docs to reflect the new field names and clean up some formatting and allowed-field lists.
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