feat(preprod): Add auto_approved status to snapshot UI

[mtopo27]

Adds frontend support for the auto_approved snapshot approval status introduced in #115291.

Search filter: Replaces the is_approved boolean search key with approval_status, a string filter with predefined dropdown values (approved, auto_approved, requires_approval). This uses the values field definition pattern (same as artifact_type) so the search bar shows a fixed dropdown instead of hitting the trace-items values endpoint, which doesn't support derived Django-model attributes.

Column & badge: Renames the "Approval" column header to "Status" and adds an "Auto Approved" tag badge for auto-approved snapshots.

Stacked on #115291 — land that first.

REFS EME-1102

[github-actions]

📊 Type Coverage Diff

Metric	Before	After	Delta
Coverage	93.51%	93.50%	🔴 -0.01%
Typed	135,417	135,426	🟢 +9
Untyped	9,403	9,407	🔴 +4

🔍 4 new type safety issues introduced

any-typed symbols (4 new)

File	Line	Detail
static/app/components/preprod/preprodBuildsSnapshotTable.snapshots.tsx	15	to (param(binding))
static/app/components/preprod/preprodBuildsSnapshotTable.snapshots.tsx	15	children (param(binding))
static/app/components/preprod/preprodBuildsSnapshotTable.snapshots.tsx	15	props (param(binding))
static/app/components/preprod/preprodBuildsSnapshotTable.snapshots.tsx	15	<pattern> (param)

This is informational only and does not block the PR.

[linear-code]

EME-1102

[NicoHinderling]

i could see an argument for making this "Approval Status" but not a big deal

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

There are 2 total unresolved issues (including 1 from previous review).

^{❌ Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, enable autofix in the Cursor dashboard.}

^{Reviewed by Cursor Bugbot for commit 0fcfcee. Configure here.}

[sentry]

Bug: Adding approval_status to both SENTRY_PREPROD_STRING_TAGS and HIDDEN_PREPROD_ATTRIBUTES causes it to be filtered out from the search bar, making it invisible.
_{Severity: MEDIUM}

Suggested Fix

Remove approval_status from the HIDDEN_PREPROD_ATTRIBUTES array. This will prevent it from being filtered out from the search bar keys while still allowing it to be available as a search tag via SENTRY_PREPROD_STRING_TAGS.

Prompt for AI Agent

Review the code at the location below. A potential bug has been identified by an AI
agent. Verify if this is a real issue. If it is, propose a fix; if not, explain why it's
not valid.

Location: static/app/views/explore/constants.tsx#L148

Potential issue: The new tag `approval_status` is added to both
`SENTRY_PREPROD_STRING_TAGS` and `HIDDEN_PREPROD_ATTRIBUTES`. The `PreprodSearchBar`
component uses `HIDDEN_PREPROD_ATTRIBUTES` to determine which keys to hide from the
search UI. The logic first merges the default tags from `SENTRY_PREPROD_STRING_TAGS`
(including `approval_status`) into the available attributes, and then immediately
removes any keys found in `HIDDEN_PREPROD_ATTRIBUTES`. Because `approval_status` is
present in both constants, it is added and then removed, preventing it from appearing as
a searchable filter in the UI and defeating the purpose of the change.

_{Did we get this right? 👍 / 👎 to inform future reviews.}