fix: Use github.action_path for shared script reference (#60)

The reviewer actions were sourcing the shared extract-result.sh script
using github.workspace, which points to the consuming repo's directory.
This fails when the action is used externally because the script only
exists in constellos-actions.

Changed to github.action_path which correctly references the action's
own directory, allowing the script to be found relative to the action.

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

Author: sylvansys

.github/actions/code-quality-reviewer/action.yml

@@ -130,7 +130,7 @@ runs:
       shell: bash
       run: |
         # Use shared extraction logic
-        source "${{ github.workspace }}/.github/actions/shared/extract-result.sh"
+        source "${{ github.action_path }}/../shared/extract-result.sh"
 
         # Handle skipped case first
         if [ "${{ steps.validate.outputs.skip }}" = "true" ]; then

.github/actions/requirements-reviewer/action.yml

@@ -169,7 +169,7 @@ runs:
       shell: bash
       run: |
         # Use shared extraction logic
-        source "${{ github.workspace }}/.github/actions/shared/extract-result.sh"
+        source "${{ github.action_path }}/../shared/extract-result.sh"
 
         # Handle skipped case first
         if [ "${{ steps.validate.outputs.skip }}" = "true" ]; then