chore: add launch counter for Sentry reporting

[mikhail-dcl]

Pull Request Description

has_identity alone doesn't recognize the first launch, as it will report false on re-login.

What does this PR change?

Adds a LaunchCounter class to the analytics domain that persists and increments a launch count across application runs via DCLPlayerPrefs. The count is attached as a tag to the Sentry loading transaction.

Key Changes

• LaunchCounter static class in Assets/DCL/PerformanceAndDiagnostics/Analytics/ — reads, increments, and persists the count
• DCLPrefKeys.LAUNCH_COUNT key for persistence
• LaunchCounter.Increment() called from AnalyticsContainer.CreateAsync alongside CrashDetector.Initialize
• launch_count tag added to the loading process Sentry transaction in LoadingStatusAnalyticsDecorator
• has_identity and identity_expired tags also included in the same transaction

Test Instructions

Test Steps

1. Launch the application
2. Verify the launch_count tag appears on the loading_process Sentry transaction
3. Close and relaunch — verify the count increments

Quality Checklist

• Changes have been tested locally
• Performance impact has been considered

[github-actions]

Windows and Mac build successful in Unity Cloud! You can find a link to the downloadable artifact below.

Name	Link
Commit	44ac8c8
Logs	https://github.com/decentraland/unity-explorer/actions/runs/24128152220
Download Windows	https://github.com/decentraland/unity-explorer/suites/63751068103/artifacts/6325078645
Download Windows S3	https://explorer-artifacts.decentraland.org/@dcl/unity-explorer/branch/chore/launch_count/pr-20802-44ac8c8/Decentraland_windows64.zip
Download Mac	https://github.com/decentraland/unity-explorer/suites/63751068103/artifacts/6324830695
Download Mac S3	https://explorer-artifacts.decentraland.org/@dcl/unity-explorer/branch/chore/launch_count/pr-20802-44ac8c8/Decentraland_macos.zip
Built on	2026-04-08T10:13:09Z

[claude]

Claude finished @mikhail-dcl's task in 1m 27s —— View job

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Code Review

• Gather context and understand request
• Read changed files
• Analyze for bugs, code quality, and performance issues
• Post review feedback

---

No issues found. The implementation is correct and clean.

Verification notes:

• LaunchCounter.Increment() is inside if (container.Enabled) in AnalyticsContainer.cs:55, and LoadingStatusAnalyticsDecorator is only instantiated when enableAnalytics is true (StaticContainer.cs:194) — these are in sync, so Count is never 0 when the Sentry tag is written.
• First launch: GetInt returns 0 → Count = 1, stored correctly.
• Subsequent launches: count increments correctly from persisted value.
• List initial capacity of 3 (LoadingStatusAnalyticsDecorator.cs:46) is accurate (max 3 tags).
• No thread safety concerns — called from UniTask on Unity main thread.

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REVIEW_RESULT: PASS ✅
COMPLEXITY: SIMPLE
QA_REQUIRED: YES

[github-actions]

Auto-approved by Claude — simple fix/chore with no blocking issues. QA approval is still required.

[claude]

Claude finished @mikhail-dcl's task in 1m 23s —— View job

---

Code Review

• Gather context and understand request
• Read changed files
• Analyze for bugs, code quality, and performance issues
• Post review feedback

---

No issues found. The implementation is correct and clean.

Verification notes:

• Tags on TransactionData is IEnumerable<KeyValuePair<string, string>>? — assigning a List<T> is valid.
• LaunchCounter.Increment() is inside if (container.Enabled) in AnalyticsContainer.cs:55, and LoadingStatusAnalyticsDecorator is only instantiated when enableAnalytics is true — these are in sync, so Count is never 0 when the Sentry tag is written.
• First launch: GetInt returns 0 → Count = 1, stored correctly.
• Subsequent launches: count increments correctly from persisted value.
• List initial capacity of 3 (LoadingStatusAnalyticsDecorator.cs:46) is accurate (max 3 tags). Allocation only on Init stage — acceptable.
• Removal of unused using JetBrains.Annotations; in DCLPrefKeys.cs is correct.

---

REVIEW_RESULT: PASS ✅
COMPLEXITY: SIMPLE
QA_REQUIRED: YES

[github-actions]

Auto-approved by Claude — simple fix/chore with no blocking issues. QA approval is still required.