fix: Vite plugin playgrounds PostgreSQL test query

[NuroDev]

Follows on from #12782, this updates the SQL query sent to the RNA Central PostgreSQL instance to use the fully-qualified-table-name.

---

• Tests
  • Tests included/updated
  • Automated tests not possible - manual testing has been completed as follows:
  • Additional testing not necessary because: Fixes internal CI issue(s)
• Public documentation
  • Cloudflare docs PR(s):
  • Documentation not necessary because: Fixes internal CI issue(s)

A picture of a cute animal (not mandatory, but encouraged)

---

[changeset-bot]

⚠️ No Changeset found

Latest commit: 7dc246c

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[workers-devprod]

Codeowners approval required for this PR:

• ✅ @cloudflare/wrangler

Show detailed file reviewers

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 1 additional finding.

[pkg-pr-new]

create-cloudflare

npm i https://pkg.pr.new/create-cloudflare@12783

@cloudflare/kv-asset-handler

npm i https://pkg.pr.new/@cloudflare/kv-asset-handler@12783

miniflare

npm i https://pkg.pr.new/miniflare@12783

@cloudflare/pages-shared

npm i https://pkg.pr.new/@cloudflare/pages-shared@12783

@cloudflare/unenv-preset

npm i https://pkg.pr.new/@cloudflare/unenv-preset@12783

@cloudflare/vite-plugin

npm i https://pkg.pr.new/@cloudflare/vite-plugin@12783

@cloudflare/vitest-pool-workers

npm i https://pkg.pr.new/@cloudflare/vitest-pool-workers@12783

@cloudflare/workers-editor-shared

npm i https://pkg.pr.new/@cloudflare/workers-editor-shared@12783

wrangler

npm i https://pkg.pr.new/wrangler@12783

commit: 497e77b