fix(ansible): preserve wizard's slm_colocated_frontend in role set_fact; fix include_vars precedence in Phase 4c

slm_manager role set_fact was unconditionally overwriting slm_colocated_frontend
with the file-detection result, discarding the True value the wizard set in the
inventory.  Change to OR expression so a wizard-supplied True is preserved.

Phase 4c had include_vars (precedence 18) loading defaults with false, then
task vars: (precedence 17) trying to set true — always losing.  Add an explicit
set_fact after include_vars so the correct value wins.

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

Author: mrveiss

autobot-slm-backend/ansible/playbooks/provision-fleet-roles.yml

@@ -357,15 +357,15 @@
           }}
       tags: ['frontend', 'slm-nginx', 'provision']
 
+    # Load role defaults so template variables are defined, then immediately
+    # override slm_colocated_frontend via set_fact (precedence 19 > include_vars 18).
     - name: "SLM | Load slm_manager defaults for nginx re-render"
       ansible.builtin.include_vars:
         file: "{{ playbook_dir }}/../roles/slm_manager/defaults/main.yml"
       when: _is_slm_frontend_colocated | bool
       tags: ['frontend', 'slm-nginx', 'provision']
 
-    # include_vars (precedence 18) would override task vars (17) so use
-    # set_fact (precedence 19) to win over the defaults' false value.
-    - name: "SLM | Override slm_colocated_frontend=true for co-located re-render"
+    - name: "SLM | Set slm_colocated_frontend=true (set_fact wins over include_vars)"
       ansible.builtin.set_fact:
         slm_colocated_frontend: true
       when: _is_slm_frontend_colocated | bool

autobot-slm-backend/ansible/roles/slm_manager/tasks/main.yml

@@ -302,7 +302,11 @@
 
 - name: "SLM | Set co-located frontend flag (#3013)"
   ansible.builtin.set_fact:
-    slm_colocated_frontend: "{{ _colocated_frontend_check.stat.exists | default(false) }}"
+    slm_colocated_frontend: >-
+      {{
+        (slm_colocated_frontend | default(false) | bool) or
+        (_colocated_frontend_check.stat.exists | default(false) | bool)
+      }}
   tags: ['slm', 'frontend', 'nginx']
 
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