Improve OS detection and adjust task sequencing in perf-lab workflow (#78)

- Enhance `capture-system-info` to detect RHEL-based systems and install `epel-release` if needed.
- Reorder task execution in workflow to optimize setup and cleanup stages.

Author: edeandrea

scripts/perf-lab/helpers/os.yml

@@ -11,6 +11,14 @@ scripts:
             - set-state: RUN.os linux
 
   capture-system-info:
+    - sh: grep '^ID=' /etc/os-release | cut -d= -f2 | tr -d '"'
+      then:
+        - regex: ".*rhel.*"
+          then:
+            - script: check-and-install-package
+              with:
+                command: fastfetch
+                package: epel-release
     - script: check-and-install-package
       with:
         command: fastfetch

scripts/perf-lab/main.yml

@@ -452,16 +452,16 @@ roles:
 #      - output-vars
       - detect-os
       - capture-system-info
-      - start-timestamp
       - cleanup-env
       - config-env
       - ensure-requirements
       - clone-repo
       - stop-test-services
+      - start-timestamp
     run-scripts:
       - run-tests
-      - download-metrics
     cleanup-scripts:
       - stop-timestamp
+      - download-metrics
       - stop-test-services
-#      - cleanup-env
+      - cleanup-env