Replace session key in cache integration with placeholder

[cleptric]

A fix was implemented to prevent session keys from appearing as cache keys in Sentry's session overview.

• Three new private methods were added to src/Sentry/Laravel/Features/CacheIntegration.php:
  • isSessionKey(string $key): bool determines if a given cache key matches the current session ID, handling prefixed keys and ensuring sessions are not prematurely started.
  • replaceSessionKey(string $key): string replaces a detected session key with the placeholder {sessionKey}.
  • replaceSessionKeys(array $keys): array applies the replacement logic to arrays of keys.
• Existing event handlers in src/Sentry/Laravel/Features/CacheIntegration.php were updated to utilize these new methods:
  • handleCacheEventsForBreadcrumbs now replaces session keys in breadcrumb messages.
  • handleCacheEventsForTracing replaces session keys in span descriptions and cache.key data for cache.get, cache.put, and cache.remove operations.
  • handleRedisCommands also applies the replacement to Redis command descriptions and parameters.
• Comprehensive tests were added to test/Sentry/Features/CacheIntegrationTest.php to verify session key replacement in breadcrumbs and spans, and to confirm that the integration does not prematurely start sessions.

This ensures session IDs are consistently anonymized as {sessionKey} in Sentry data, improving readability and privacy.

[Copilot]

Pull Request Overview

This PR ensures that session IDs are anonymized as {sessionKey} in Sentry breadcrumbs, spans, and Redis command data by replacing any detected session key in cache and Redis integrations.

• Introduces methods to retrieve the current session ID and replace it (and arrays of keys) with a placeholder.
• Updates cache and Redis event handlers to apply the replacement logic to breadcrumb messages, span descriptions, and parameters.
• Adds comprehensive tests to verify placeholder substitution and prevent premature session starts.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
test/Sentry/Features/CacheIntegrationTest.php	Added tests for replacing session keys with {sessionKey} in breadcrumbs and spans, and verifying no premature session start.
src/Sentry/Laravel/Features/CacheIntegration.php	Added getSessionKey, replaceSessionKey, replaceSessionKeys methods and updated event handlers to use them.

Comments suppressed due to low confidence (1)

test/Sentry/Features/CacheIntegrationTest.php:196

• There’s no test for session keys stored with a cache prefix. Adding a test case that uses a prefixed session ID (e.g., prefix_{$sessionId}) would ensure the replacement logic covers those scenarios.

    public function testCacheSpanReplacesMultipleSessionKeysWithPlaceholder(): void

[cleptric]

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