feat: Jellyfin/Plex auto-import via watch queue

Webhook ingestion from media servers — movies land in a pending
watch queue, user rates and confirms to create diary entries.

- domain: WatchEvent, WebhookToken models, MediaServerParser port
- adapters: jellyfin + plex parser crates, SQLite + Postgres repos
- application: ingest/confirm/dismiss/cleanup use cases, token mgmt
- presentation: webhook endpoints (bearer + query param auth),
  watch queue + integrations settings HTML pages, OpenAPI docs
- worker: WatchEventCleanupJob (daily, 30d retention)

Movie resolution deferred to confirm — single canonical path
through log_review for enrichment, poster fetch, federation.

crates/adapters/jellyfin/src/lib.rs

@@ -0,0 +1,132 @@
+use domain::{errors::DomainError, models::ParsedPlaybackEvent, ports::MediaServerParser};
+use serde::Deserialize;
+
+pub struct JellyfinParser;
+
+impl MediaServerParser for JellyfinParser {
+    fn parse_playback_event(
+        &self,
+        body: &[u8],
+    ) -> Result<Option<ParsedPlaybackEvent>, DomainError> {
+        let payload: JellyfinPayload = serde_json::from_slice(body)
+            .map_err(|e| DomainError::ValidationError(format!("invalid Jellyfin payload: {e}")))?;
+
+        if payload.notification_type != "PlaybackStop" {
+            return Ok(None);
+        }
+
+        let item_type = payload.item_type.as_deref().unwrap_or("");
+        if item_type != "Movie" {
+            return Ok(None);
+        }
+
+        if !payload.played_to_completion.unwrap_or(false) {
+            return Ok(None);
+        }
+
+        let title = match payload.name {
+            Some(t) if !t.is_empty() => t,
+            _ => return Ok(None),
+        };
+
+        let tmdb_id = payload.provider_tmdb.map(|id| format!("tmdb:{id}"));
+        let imdb_id = payload.provider_imdb;
+
+        Ok(Some(ParsedPlaybackEvent {
+            title,
+            year: payload.year,
+            tmdb_id,
+            imdb_id,
+        }))
+    }
+}
+
+#[derive(Deserialize)]
+struct JellyfinPayload {
+    #[serde(rename = "NotificationType")]
+    notification_type: String,
+    #[serde(rename = "ItemType")]
+    item_type: Option<String>,
+    #[serde(rename = "Name")]
+    name: Option<String>,
+    #[serde(rename = "Year")]
+    year: Option<u16>,
+    #[serde(rename = "PlayedToCompletion")]
+    played_to_completion: Option<bool>,
+    #[serde(rename = "Provider_tmdb")]
+    provider_tmdb: Option<String>,
+    #[serde(rename = "Provider_imdb")]
+    provider_imdb: Option<String>,
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn parses_valid_playback_stop() {
+        let body = serde_json::json!({
+            "NotificationType": "PlaybackStop",
+            "ItemType": "Movie",
+            "Name": "Blade Runner",
+            "Year": 1982,
+            "PlayedToCompletion": true,
+            "Provider_tmdb": "78",
+            "Provider_imdb": "tt0083658"
+        });
+        let parser = JellyfinParser;
+        let result = parser
+            .parse_playback_event(serde_json::to_vec(&body).unwrap().as_slice())
+            .unwrap();
+        let event = result.expect("should parse");
+        assert_eq!(event.title, "Blade Runner");
+        assert_eq!(event.year, Some(1982));
+        assert_eq!(event.tmdb_id, Some("tmdb:78".into()));
+        assert_eq!(event.imdb_id, Some("tt0083658".into()));
+    }
+
+    #[test]
+    fn ignores_non_movie() {
+        let body = serde_json::json!({
+            "NotificationType": "PlaybackStop",
+            "ItemType": "Episode",
+            "Name": "Some Episode",
+            "PlayedToCompletion": true
+        });
+        let parser = JellyfinParser;
+        let result = parser
+            .parse_playback_event(serde_json::to_vec(&body).unwrap().as_slice())
+            .unwrap();
+        assert!(result.is_none());
+    }
+
+    #[test]
+    fn ignores_incomplete_playback() {
+        let body = serde_json::json!({
+            "NotificationType": "PlaybackStop",
+            "ItemType": "Movie",
+            "Name": "Blade Runner",
+            "PlayedToCompletion": false
+        });
+        let parser = JellyfinParser;
+        let result = parser
+            .parse_playback_event(serde_json::to_vec(&body).unwrap().as_slice())
+            .unwrap();
+        assert!(result.is_none());
+    }
+
+    #[test]
+    fn ignores_playback_start() {
+        let body = serde_json::json!({
+            "NotificationType": "PlaybackStart",
+            "ItemType": "Movie",
+            "Name": "Blade Runner",
+            "PlayedToCompletion": false
+        });
+        let parser = JellyfinParser;
+        let result = parser
+            .parse_playback_event(serde_json::to_vec(&body).unwrap().as_slice())
+            .unwrap();
+        assert!(result.is_none());
+    }
+}