refactor(event): replace "latest" magic string with @latest sentinel constant

[BYK]

Summary

Follow-up to #574 — the bare string "latest" was used as a sentinel eventId value across 4 assignment sites and 1 comparison with no named constant.

Replaced with LATEST_EVENT_SENTINEL = "@latest", using the @-prefix convention established by IssueSelector magic selectors (@latest, @most_frequent) in arg-parsing.ts.

Changes

• src/commands/event/view.ts: Added LATEST_EVENT_SENTINEL constant, replaced all 5 occurrences + updated comment
• test/commands/event/view.test.ts: Updated 8 assertions to expect "@latest"

[github-actions]

Semver Impact of This PR

🟢 Patch (bug fixes)

📋 Changelog Preview

This is how your changes will appear in the changelog.
Entries from this PR are highlighted with a left border (blockquote style).

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New Features ✨

Dashboard

• Add pagination and glob filtering to dashboard list by BYK in #560
• Rich terminal chart rendering for dashboard view by BYK in #555

Init

• Propagate sentry-trace headers to wizard API calls by betegon in #567
• Treat bare slug as new project name when not found by BYK in #554

Other

• (formatters) Colorize SQL in DB span descriptions by BYK in #546
• (telemetry) Report unknown commands to Sentry by BYK in #563
• Bidirectional cursor pagination (-c next / -c prev) by BYK in #564
• Add sentry sourcemap inject and sentry sourcemap upload commands by BYK in #547
• Native debug ID injection and sourcemap upload by BYK in #543

Bug Fixes 🐛

Dashboard

• Validate display types against all datasets by betegon in #577
• Auto-clamp widget limit instead of erroring by BYK in #573
• Default issue dataset table columns to ["issue"] by betegon in #570
• Scale timeseries bar width to fill chart area by BYK in #562
• Resolve dashboard by ID/slug in addition to title by BYK in #559

Event

• Detect SHORT-ID/EVENT-ID format in event view by BYK in #574
• Auto-fallback to org-wide search when event 404s in project by BYK in #575

Other

• (api) Show meaningful message for network errors instead of '0 Unknown' by BYK in #572
• (event-view) Auto-redirect issue short IDs in two-arg form (CLI-MP) by BYK in #558
• (help) Show help when user passes help as positional arg by BYK in #561
• (issue) Auto-redirect bare org slug to org-all mode in issue list by BYK in #576
• Reject @-selectors in parseOrgProjectArg with helpful redirect by BYK in #557

Internal Changes 🔧

Coverage

• Use informational-patch input instead of sed hack by BYK in #544
• Make checks informational on release branches by BYK in #541

Event

• Replace "latest" magic string with @latest sentinel constant by BYK in #583

• Deduplicate span tree building into shared helper by BYK in #581

Other

• (api) Collapse stats on issue detail endpoints to save 100-300ms by BYK in #551
• (ci) Upgrade GitHub Actions to Node 24 runtime by BYK in #542
• (db) DRY up database layer with shared helpers and lint enforcement by BYK in #550
• (issue-list) Use collapse parameter to skip unused Snuba queries by BYK in #545
• Bump Bun from 1.3.9 to 1.3.11 by BYK in #552
• Regenerate skill files by github-actions[bot] in ec1ffe28

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[github-actions]

Codecov Results 📊

✅ 126 passed | Total: 126 | Pass Rate: 100% | Execution Time: 0ms

📊 Comparison with Base Branch

Metric	Change
Total Tests	—
Passed Tests	—
Failed Tests	—
Skipped Tests	—

✨ No test changes detected

All tests are passing successfully.

✅ Patch coverage is 100.00%. Project has 1270 uncovered lines.
✅ Project coverage is 95.47%. Comparing base (base) to head (head).

Coverage diff

@@            Coverage Diff             @@
##          main       #PR       +/-##
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+ Coverage    95.47%    95.47%        —%
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  Files          194       194         —
  Lines        28036     28037        +1
  Branches         0         0         —
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+ Hits         26766     26767        +1
- Misses        1270      1270         —
- Partials         0         0         —

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