fix(wrangler): match D1 compound END case-insensitively

[HaoChiBao]

Summary

• isCompoundStatementStart already matches BEGIN/CASE case-insensitively, but isCompoundStatementEnd required uppercase END.
• A lowercase end; left the splitter inside a compound statement and broke statement boundaries (e.g. triggers + following SQL).
• Add a regression test for lowercase end.

Test plan

• Added splitter unit coverage for lowercase end;
• CI: packages/wrangler d1 splitter tests

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[changeset-bot]

⚠️ No Changeset found

Latest commit: 266d3cf

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[workers-devprod]

Codeowners approval required for this PR:

• @cloudflare/d1
• @cloudflare/wrangler

Show detailed file reviewers

• packages/wrangler/src/tests/d1/splitter.test.ts: [@cloudflare/d1 @cloudflare/wrangler]
• packages/wrangler/src/d1/splitter.ts: [@cloudflare/d1 @cloudflare/wrangler]

[devin-ai-integration]

Devin Review found 1 potential issue.

[devin-ai-integration]

🟡 Bug fix to a published package ships without a changeset, so users never get the release note

The behavior fix to D1 statement splitting (/\sEND[;\s]$/i at packages/wrangler/src/d1/splitter.ts:169) is added without any accompanying changeset entry, so the fix will not trigger a release or appear in the changelog.
Impact: Users won't see the fix documented and it may not be published.

Repository rule requiring changesets for published package changes

AGENTS.md states "All changes to published packages require a changeset" and CONTRIBUTING.md requires a changeset for every non-trivial change. The PR touches packages/wrangler/src/d1/splitter.ts (a published package's source) but .changeset/ only contains README.md, config.json, and an unrelated dependabot-update-15072.md. A patch changeset for wrangler describing the user-facing fix should be added.

Prompt for agents

Add a patch changeset for the wrangler package describing this user-facing bug fix: D1 SQL files using a lowercase 'end;' to close a compound statement (e.g. triggers) were previously split incorrectly. Follow .changeset/README.md rules: no conventional-commit prefix in the title, focus on user impact, no h1/h2/h3 headers.

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[petebacondarwin]

Thanks for this. Please add a changeset as is described in our Contributing guidelines.

[alsuren]

This seems to duplicate #15094 , which I already approved and only needs minor tweaks.

To avoid duplication of work: please follow that PR, and only re-open this PR if that one stalls and gets closed.