ci(cli): pin bun canary to 1.3.0-canary.20251021.1 in release workflow to work around binary build crashes.

This change stabilizes CI for CLI releases by using a known-good Bun canary.

🤖 Generated with Codebuff
Co-Authored-By: Codebuff <noreply@codebuff.com>

Author: brandonkachen

.github/workflows/cli-release-build.yml

@@ -66,6 +66,8 @@ jobs:
           ref: ${{ inputs.checkout-ref || github.sha }}
 
       - uses: ./.github/actions/setup-project
+        with:
+          bun-version: '1.3.0-canary.20251021.1'
 
       - name: Download staging metadata
         if: inputs.artifact-name != ''