ref: fix 'occured' -> 'occurred' typos across sentry_apps, UI, and loader templates

[SAY-5]

Summary

Fix occured → occurred typos across Sentry. Multiple are user-visible — surfaced in API error responses, the JS SDK loader template (served to every site using the loader), and UI components.

Changes

Source fixes

File	Kind	User-visible?
src/sentry/sentry_apps/utils/errors.py	API error detail + comment	✅ yes
src/sentry/sentry_apps/external_requests/issue_link_requester.py	API error message	✅ yes
src/sentry/templates/sentry/js-sdk-loader.js.tmpl	Loader template comment	served in loader output
src/sentry/templates/sentry/js-sdk-loader.ts	TS source for loader	served in loader output
static/app/views/insights/crons/types.tsx	JSDoc comment	no
static/app/views/preprod/buildDetails/sidebar/buildDetailsSidebarStatusCheck.tsx	User-visible error message	✅ yes
static/gsApp/components/upgradeNowModal/modalSamePrice.tsx	Modal body text	✅ yes

Test updates (following the string changes)

• tests/sentry/sentry_apps/api/bases/test_sentryapps.py
• tests/sentry/sentry_apps/api/endpoints/test_sentry_app_installation_external_issue_actions.py
• tests/sentry/sentry_apps/api/endpoints/test_sentry_app_installation_external_issues.py

All assertions against the old string updated to match. Tests stay green.

Testing

String-replacement change. Existing test suite (updated assertions) verifies the new strings.

[github-actions]

🚨 Warning: This pull request contains Frontend and Backend changes!

It's discouraged to make changes to Sentry's Frontend and Backend in a single pull request. The Frontend and Backend are not atomically deployed. If the changes are interdependent of each other, they must be separated into two pull requests and be made forward or backwards compatible, such that the Backend or Frontend can be safely deployed independently.

Have questions? Please ask in the #discuss-dev-infra channel.

[github-actions]

🚨 Warning: This pull request contains Frontend and Backend changes!

It's discouraged to make changes to Sentry's Frontend and Backend in a single pull request. The Frontend and Backend are not atomically deployed. If the changes are interdependent of each other, they must be separated into two pull requests and be made forward or backwards compatible, such that the Backend or Frontend can be safely deployed independently.

Have questions? Please ask in the #discuss-dev-infra channel.

[SAY-5]

Note: CI failures appear to be external-PR permission gates (permissions step in getsentry dispatch, snapshot upload permission) rather than anything introduced by this change. The actual test assertions have been updated to match the new corrected strings. Happy to rebase if needed after a maintainer kicks the CI.