Add macOS support to test workflows

Add macOS to test and test-e2e job matrices. macOS uses the same bash installation script as Linux for Claude Code setup.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: ashwin-ant

.github/workflows/test.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest]
+        os: [ubuntu-latest, macos-latest, windows-latest]
         python-version: ["3.10", "3.11", "3.12", "3.13"]
 
     steps:
@@ -42,7 +42,7 @@ jobs:
     needs: test # Run after unit tests pass
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest]
+        os: [ubuntu-latest, macos-latest, windows-latest]
         python-version: ["3.10", "3.11", "3.12", "3.13"]
 
     steps:
@@ -53,8 +53,8 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
 
-      - name: Install Claude Code (Linux)
-        if: runner.os == 'Linux'
+      - name: Install Claude Code (Linux/macOS)
+        if: runner.os == 'Linux' || runner.os == 'macOS'
         run: |
           curl -fsSL https://claude.ai/install.sh | bash
           echo "$HOME/.local/bin" >> $GITHUB_PATH