Chris McDonough 8deac2fee8 Fix constant re-ingestion when server provides no revision header ... HTTP, S3, and WebDAV sources all check `revision is not None and snapshot.get(uri) == revision` to decide UPSERT vs UNCHANGED. When a server returns no ETag or Last-Modified, revision is None and the condition always fails — every sweep emits UPSERT even though the content hasn't changed. Now emit UNCHANGED when revision is None and the URI is already known (has been ingested before). A first-time discovery with no revision still correctly emits UPSERT.		2026-06-01 18:14:27 +03:00
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rag	Fix constant re-ingestion when server provides no revision header	2026-06-01 18:14:27 +03:00