Make README diagrams vertical and clickable

infra-run/ansible/inventory/README.md

@@ -6,10 +6,10 @@ This directory is intended for Ansible inventory definitions. It separates share
 
 ```mermaid
 flowchart TD
-  A["inventory"] --> B["group_vars"]
-  A --> C["host_vars"]
-  B --> D["Shared environment variables"]
-  C --> E["Per-host overrides"]
+  A["inventory"] --> B["group_vars"] --> C["host_vars"]
+  click A href "./" "inventory"
+  click B href "./group_vars/" "group_vars"
+  click C href "./host_vars/" "host_vars"
 ```
 
 ## Scope

infra-run/ansible/inventory/group_vars/README.md

@@ -6,9 +6,8 @@ This folder is reserved for shared Ansible variables applied to inventory groups
 
 ```mermaid
 flowchart TD
-  A["group_vars"] --> B["Environment defaults"]
-  A --> C["Role parameters"]
-  A --> D["Shared operational values"]
+  A["group_vars"]
+  click A href "./" "group_vars"
 ```
 
 ## Notes

infra-run/ansible/inventory/host_vars/README.md

@@ -6,9 +6,8 @@ This folder is intended for host-specific Ansible variables. It complements `gro
 
 ```mermaid
 flowchart TD
-  A["host_vars"] --> B["Host A overrides"]
-  A --> C["Host B overrides"]
-  A --> D["Per-node secrets or tuning"]
+  A["host_vars"]
+  click A href "./" "host_vars"
 ```
 
 ## Notes