ci(setup-bun): pin default Bun to 1.3.0 to satisfy strict build script; allow override via input

Author: riatzukiza

.github/actions/setup-bun/action.yml

@@ -1,20 +1,22 @@
-name: "Setup Bun"
-description: "Setup Bun with caching and install dependencies"
+name: setup-bun
+description: Setup Bun with optional version pinning and basic cache
+inputs:
+  bun-version:
+    description: Version of Bun to install (e.g., 1.3.0)
+    required: false
+    default: '1.3.0'
 runs:
-  using: "composite"
+  using: composite
   steps:
     - name: Setup Bun
       uses: oven-sh/setup-bun@v2
+      with:
+        bun-version: ${{ inputs.bun-version }}
 
-    - name: Cache ~/.bun
-      id: cache-bun
+    - name: Cache Bun install dir
       uses: actions/cache@v4
       with:
         path: ~/.bun
-        key: ${{ runner.os }}-bun-${{ hashFiles('bun.lockb', 'bun.lock') }}
+        key: ${{ runner.os }}-bun-${{ inputs.bun-version }}
         restore-keys: |
           ${{ runner.os }}-bun-
-
-    - name: Install dependencies
-      run: bun install
-      shell: bash