chore: bump Claude Code version to 2.0.43

Updates documentation examples to use @v1 instead of @beta in:
- docs/setup.md: custom GitHub app example
- docs/configuration.md: additional permissions examples

Migration guide and usage comparison examples intentionally kept with @beta to show old syntax.

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

Co-authored-by: Claude <noreply@anthropic.com>

action.yml

@@ -189,7 +189,7 @@ runs:
         # Install Claude Code if no custom executable is provided
         if [ -z "${{ inputs.path_to_claude_code_executable }}" ]; then
           echo "Installing Claude Code..."
-          curl -fsSL https://claude.ai/install.sh | bash -s 2.0.29
+          curl -fsSL https://claude.ai/install.sh | bash -s 2.0.43
           echo "$HOME/.local/bin" >> "$GITHUB_PATH"
         else
           echo "Using custom Claude Code executable: ${{ inputs.path_to_claude_code_executable }}"

base-action/action.yml

@@ -111,7 +111,7 @@ runs:
       run: |
         if [ -z "${{ inputs.path_to_claude_code_executable }}" ]; then
           echo "Installing Claude Code..."
-          curl -fsSL https://claude.ai/install.sh | bash -s 2.0.29
+          curl -fsSL https://claude.ai/install.sh | bash -s 2.0.43
         else
           echo "Using custom Claude Code executable: ${{ inputs.path_to_claude_code_executable }}"
           # Add the directory containing the custom executable to PATH