Merge branch 'main' into copilot/add-pdfa-export-option

.env.demo

@@ -325,7 +325,7 @@ WEBHOOK_ENABLED=True
 
 # Uptime Kuma
 UPTIME_KUMA_URL=https://status.example.com/api/push/abcdef123456?status=up
-UPTIME_KUMA_PING_INTERVAL=5
+UPTIME_KUMA_PING_INTERVAL=5
 
 # **Full-Text Search (Meilisearch)**
 # URL for the Meilisearch instance.
@@ -369,4 +369,10 @@ GOOGLE_DRIVE_PDFA_FOLDER_ID=
 # RFC 3161 timestamping of PDF/A files (creates .tsr proof-of-existence files)
 PDFA_TIMESTAMP_ENABLED=false
 # Timestamp Authority URL (default: FreeTSA, a free RFC 3161 TSA)
-PDFA_TIMESTAMP_URL=https://freetsa.org/tsr
+PDFA_TIMESTAMP_URL=https://freetsa.org/tsr
+# Model used to generate text embeddings for document similarity.
+# Must be supported by your OpenAI-compatible API endpoint.
+EMBEDDING_MODEL=text-embedding-3-small
+# Maximum tokens to send to the embedding model.  Set below the model's
+# context window (e.g. 8000 for an 8192-token model).
+EMBEDDING_MAX_TOKENS=8000