o/snapstate: include store url in snap setup and auxinfo stored on disk

[olivercalder]

This is a follow-up to f2c208e, which added the "store-url" field to snap auxinfo. However, the caller of keepAuxStoreInfo never actually set the StoreURL field, so the auxinfo stored to disk continued to be lacking it.

Other related commits are eee4a0e, which set up cmd/snap to look for store URL in the local snap's auxinfo, and 25ca263, which included store URL in the store request.

To see evidence of the store URL currently being missing from local snap info, see the following (assuming snapd and jq are installed):

# get snap info from the store (where the field exists)
snap debug api '/v2/find?name=snapd' | jq '.result.[0]' | grep '"store-url"'
# get store info for locally-installed snapd (where it's missing)
snap debug api '/v2/snaps/snapd' | jq '.result' | grep '"store-url"'
# check the cached auxinfo for snapd (missing here)
cat /var/cache/snapd/aux/PMrrV4ml8uWuEUDBT8dSGnKUYbevVhc4.json | jq | grep '"store-info"'

In contrast, top-level "media" and "website" fields are always present:

# get snap info from the store
snap debug api '/v2/find?name=snapd' | jq '.result.[0]' | grep '"media"'
snap debug api '/v2/find?name=snapd' | jq '.result.[0]' | grep '"website"'
# get store info for locally-installed snapd
snap debug api '/v2/snaps/snapd' | jq '.result' | grep '"media"'
snap debug api '/v2/snaps/snapd' | jq '.result' | grep '"website"'
# check the cached auxinfo for snapd
cat /var/cache/snapd/aux/PMrrV4ml8uWuEUDBT8dSGnKUYbevVhc4.json | jq | grep '"media"'
cat /var/cache/snapd/aux/PMrrV4ml8uWuEUDBT8dSGnKUYbevVhc4.json | jq | grep '"website"'

This work is tracked internally by https://warthogs.atlassian.net/browse/SNAPDENG-34480

[codecov]

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[github-actions]

Fri Feb 7 17:42:53 UTC 2025
The following results are from: https://github.com/canonical/snapd/actions/runs/13189031878

Failures:

Preparing:

• openstack:opensuse-tumbleweed-64
• openstack:opensuse-tumbleweed-64
• openstack:opensuse-tumbleweed-64
• openstack:opensuse-tumbleweed-64
• openstack:opensuse-tumbleweed-64
• openstack:opensuse-tumbleweed-64
• openstack:opensuse-15.6-64
• openstack:opensuse-15.6-64
• openstack:opensuse-15.6-64
• openstack:opensuse-15.6-64
• openstack:opensuse-15.6-64
• openstack:opensuse-15.6-64

Executing:

• google:ubuntu-25.04-64:tests/main/security-device-cgroups-strict-enforced
• google:ubuntu-25.04-64:tests/main/security-device-cgroups-serial-port
• google:ubuntu-25.04-64:tests/main/security-device-cgroups-self-manage
• google:ubuntu-25.04-64:tests/main/cgroup-devices-v2
• google:ubuntu-25.04-64:tests/main/security-device-cgroups-required-or-optional
• google:ubuntu-25.04-64:tests/main/security-device-cgroups-helper
• google:ubuntu-25.04-64:tests/main/security-device-cgroups:kmsg
• google:ubuntu-25.04-64:tests/main/security-device-cgroups:uinput

Restoring:

• google:ubuntu-25.04-64:tests/main/security-device-cgroups-strict-enforced

[bboozzoo]

LGTM

[andrewphelpsj]

Thanks!