internal/worker: insert module if not in module_version_states

If a module is introduced for the first time to pkgsite through frontend
fetch, and not the index, it won't have a row in module_version_states.

A row is now inserted before the fetch process begins if the proxy's
info endpoint tells us that this is a valid module.

This fixes a bug in the fetch flow where
module_version_states.last_processed_at is not updated in
upsertModuleVersionState if a row did not already exist.

For golang/go#46985

Change-Id: I2a166228df20b1fb935bbabebb5a651da0e2c1ba
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/341892
Trust: Julie Qiu <julie@golang.org>
Run-TryBot: Julie Qiu <julie@golang.org>
TryBot-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jonathan Amsterdam <jba@google.com>

0 files changed, 0 insertions, 0 deletions