fix(webhook): log reason for 400 responses#3
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ttlequals0 merged 2 commits intomainfrom Apr 12, 2026
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Plex deliveries were being rejected with bare HTTP 400s and no log output, making it impossible to tell which failure path fired (multipart parse, missing payload field, or JSON unmarshal). Each 400 branch now logs the error plus diagnostics (Content-Type, form/file part keys, payload snippet) so the root cause of real Plex failures can be diagnosed from logs alone.
Plex sends Metadata.Guid as an array of objects for items with multiple provider IDs (imdb, tmdb, tvdb). PlexWebhookPayload declared it as a string, so json.Unmarshal failed on every such payload and the handler returned 400, making labelarr ignore all real webhooks. The field was never read anywhere in the codebase; removing it lets the JSON decoder skip it regardless of shape.
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