Andrew Nesbitt c01f0a5c05 Fix metadata caching, 404 propagation, mirror progress, and registry stubs ... - ProxyCached now stores upstream Last-Modified in the cache and uses it (along with ETag) for conditional request handling, returning 304 when client validators match. Adds Content-Length to cached responses. - Handlers calling FetchOrCacheMetadata (pypi, composer, pub, nuget) now check for ErrUpstreamNotFound and return 404 instead of 502, matching the existing npm and cargo behavior. - Mirror jobs report live progress via a periodic callback while running, so API polls return real counts instead of zeroed progress. - Registry mirroring removed from CLI flags, API acceptance, README, and docs since every enumerator was a stub returning "not yet implemented". - Added tests for the conditional metadata path (ETag/If-None-Match, Last-Modified/If-Modified-Since, 304 responses, header omission).		2026-04-13 09:01:05 +01:00
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job.go	Fix metadata caching, 404 propagation, mirror progress, and registry stubs	2026-04-13 09:01:05 +01:00
job_test.go	Fix metadata caching, 404 propagation, mirror progress, and registry stubs	2026-04-13 09:01:05 +01:00
mirror.go	Fix metadata caching, 404 propagation, mirror progress, and registry stubs	2026-04-13 09:01:05 +01:00
mirror_test.go	Add mirror command and API for selective package mirroring	2026-04-13 09:01:04 +01:00
registry.go	Fix metadata caching, 404 propagation, mirror progress, and registry stubs	2026-04-13 09:01:05 +01:00
registry_test.go	Add mirror command and API for selective package mirroring	2026-04-13 09:01:04 +01:00
source.go	Add mirror command and API for selective package mirroring	2026-04-13 09:01:04 +01:00
source_test.go	Add mirror command and API for selective package mirroring	2026-04-13 09:01:04 +01:00