fix(wrangler): vectorize list and list-metadata-index should output valid json

[MaxwellCalkin]

Fixes #11011.

Follows the same pattern as PR #10517 (which fixed list-vectors --json for #10508).

Problem

wrangler vectorize list --json and wrangler vectorize list-metadata-index --json print a human-readable log message before the JSON output:

📋 Listing Vectorize indexes...
[
  { ... }
]

This makes stdout invalid JSON and breaks piping to jq and other tools.

Fix

Wrap the logger.log() calls in if (!args.json) guards so the log message is suppressed when --json is used — the same one-line pattern applied in #10517 for list-vectors.

list.ts:

-		logger.log(`📋 Listing Vectorize indexes...`);
+		if (!args.json) {
+			logger.log(`📋 Listing Vectorize indexes...`);
+		}

listMetadataIndex.ts:

-		logger.log(`📋 Fetching metadata indexes...`);
+		if (!args.json) {
+			logger.log(`📋 Fetching metadata indexes...`);
+		}

---

• Tests
  • Tests included
  • Tests not necessary because:
• Public documentation
  • Cloudflare docs PR(s):
  • Documentation not necessary because: bugfix
• Wrangler V3 Backport
  • Wrangler PR:
  • Not necessary because: v4 only

---

[changeset-bot]

🦋 Changeset detected

Latest commit: d1ad964

The changes in this PR will be included in the next version bump.

Not sure what this means? Click here to learn what changesets are.

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

[workers-devprod]

Codeowners approval required for this PR:

• ✅ @cloudflare/wrangler

Show detailed file reviewers

[pkg-pr-new]

create-cloudflare

npm i https://pkg.pr.new/create-cloudflare@12807

@cloudflare/kv-asset-handler

npm i https://pkg.pr.new/@cloudflare/kv-asset-handler@12807

miniflare

npm i https://pkg.pr.new/miniflare@12807

@cloudflare/pages-shared

npm i https://pkg.pr.new/@cloudflare/pages-shared@12807

@cloudflare/unenv-preset

npm i https://pkg.pr.new/@cloudflare/unenv-preset@12807

@cloudflare/vite-plugin

npm i https://pkg.pr.new/@cloudflare/vite-plugin@12807

@cloudflare/vitest-pool-workers

npm i https://pkg.pr.new/@cloudflare/vitest-pool-workers@12807

@cloudflare/workers-editor-shared

npm i https://pkg.pr.new/@cloudflare/workers-editor-shared@12807

wrangler

npm i https://pkg.pr.new/wrangler@12807

commit: 81f1dfe

[dario-piotrowicz]

Looks good to me, besides the changeset which I think that ideally should be updated