Improve oracle-db-postinstall role robustness

- Enhance systemd service template with proper User/Group/Environment settings
- Use variables in cron cleaner script instead of hardcoded paths
- Add comprehensive path validations before operations
- Create validations.yml for prerequisite checks
- Improve service dependencies and startup order

roles/oracle-db-postinstall/tasks/main.yml

@@ -10,11 +10,8 @@
     msg: "Prérequis non satisfaits : RAM >= 2GB"
   tags: prerequisites
 
-- name: Vérifier que Oracle est installé
-  ansible.builtin.stat:
-    path: "{{ oracle_home }}/bin/sqlplus"
-  register: oracle_installed
-  failed_when: not oracle_installed.stat.exists
+- name: Inclure les validations des chemins et fichiers
+  ansible.builtin.include_tasks: validations.yml
   tags: prerequisites
 
 # ---------------------------------------------------

roles/oracle-db-postinstall/tasks/validations.yml

@@ -0,0 +1,32 @@
+---
+#
+# Validations préalables pour le rôle oracle-db-postinstall
+#
+
+- name: Vérifier que le répertoire scripts_dir existe
+  ansible.builtin.stat:
+    path: "{{ scripts_dir }}"
+  register: scripts_dir_check
+  failed_when: not scripts_dir_check.stat.exists
+  tags: prerequisites
+
+- name: Vérifier que ORACLE_HOME est accessible
+  ansible.builtin.stat:
+    path: "{{ oracle_home }}"
+  register: oracle_home_check
+  failed_when: not oracle_home_check.stat.exists
+  tags: prerequisites
+
+- name: Vérifier que les binaires Oracle existent
+  ansible.builtin.stat:
+    path: "{{ oracle_home }}/bin/sqlplus"
+  register: sqlplus_check
+  failed_when: not sqlplus_check.stat.exists
+  tags: prerequisites
+
+- name: Vérifier que dbstart et dbshut existent
+  ansible.builtin.stat:
+    path: "{{ oracle_home }}/bin/dbstart"
+  register: dbstart_check
+  failed_when: not dbstart_check.stat.exists
+  tags: prerequisites