fix(ci): remove UTF-8 BOM from lab-02 scripts, set shellcheck --severity=warning

Author: RedjiJB

.github/workflows/ci.yml

@@ -27,7 +27,7 @@ jobs:
       - name: ShellCheck — lab test scripts
         run: |
           sudo apt-get install -y shellcheck -qq
-          shellcheck tests/labs/*.sh
+          shellcheck --severity=warning tests/labs/*.sh
 
       - name: Validate module manifest
         run: |

tests/labs/test-lab-07-02.sh

@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env bash
 # test-lab-07-02.sh — Lab 07-02: External Dependencies
 # Module 07: Mattermost — external PostgreSQL, Redis, mailhog SMTP relay
 set -euo pipefail