fix: replace python3 with py/jq throughout scripts and docs

Windows Store python3 stub returns exit 49 instead of running Python.
Replace with: py (Windows launcher) for actual Python code, jq for
simple JSON extraction. Reorder fallback loops to try py first.
Add Bash(py:*) to settings.local.json allowlist.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.claude/skills/1password/references/secret_references.md

@@ -102,8 +102,7 @@ op run --env-file=n8n.env.tpl -- docker compose up n8n
 
 ```bash
 # List all fields in an item
-op item get "Item Name" --format=json | \
-  python3 -c "import sys,json; [print(f['label']) for f in json.load(sys.stdin)['fields'] if f.get('value')]"
+op item get "Item Name" --format=json | jq -r '.fields[] | select(.value) | .label'
 
 # Or view interactively
 op item get "Item Name"