v0.80.0

What's Changed

• search: grounded answers slice 1 -- a streaming transport protocol, the standalone transport's breaker and span, and the answer contracts by @brookstalley in #935
• core tests: a stuck scope's rebuilds are waited on, not raced by a loop that starves the rebuild's export by @brookstalley in #946
• core tests: the stuck-scope test's delete fake takes marker_ttl by @pacepace in #989
• search: grounded answers -- carry a provider's cited synthesis in the search leaf (design + slices 0-3) by @brookstalley in #930
• evals: the senior-level report (plan chunks 00–08) and a report read that holds one analysis (#951) by @brookstalley in #956
• 0.80.0: an edge-cacheable read may qualify its scopes by a second namespace node (per-report access) by @pacepace in #988
• backup: a drill compares a naive-timestamp table against the backup's moment by @pacepace in #990
• object-store: presign on a worker thread with one kept client, not an aiobotocore client per URL on the loop by @pacepace in #991
• evals: scope_export pages a large scope; a cost cap carries a 3% safety margin beside the band from history by @brookstalley in #992
• release: v0.80.0 by @pacepace in #994
• Release v0.80.0 by @pacepace in #995

Full Changelog: v0.79.0...v0.80.0