refactor(partitioning): split monolithic main.yml into focused task files

roles/partitioning/tasks/_detect_sizing.yml

@@ -0,0 +1,38 @@
+---
+- name: Detect system memory for swap sizing
+  when:
+    - system_cfg.features.swap.enabled | bool
+    - partitioning_vm_memory is not defined or (partitioning_vm_memory | float) <= 0
+    - (system_cfg.memory | default(0) | float) <= 0
+  block:
+    - name: Read system memory
+      ansible.builtin.command: awk '/MemTotal/ {print int($2/1024)}' /proc/meminfo
+      register: partitioning_memtotal_mb
+      changed_when: false
+      failed_when: false
+
+    - name: Set partitioning vm memory default
+      ansible.builtin.set_fact:
+        partitioning_vm_memory: "{{ (partitioning_memtotal_mb.stdout | default('4096') | int) | float }}"
+
+- name: Set partitioning vm_size for physical installs
+  when:
+    - system_cfg.type == "physical"
+    - partitioning_vm_size is not defined or (partitioning_vm_size | float) <= 0
+    - install_drive | length > 0
+  block:
+    - name: Detect install drive size
+      ansible.builtin.command: "lsblk -b -dn -o SIZE {{ install_drive }}"
+      register: partitioning_disk_size_bytes
+      changed_when: false
+
+    - name: Set partitioning vm_size from install drive size
+      when:
+        - partitioning_disk_size_bytes.stdout is defined
+        - (partitioning_disk_size_bytes.stdout | trim | length) > 0
+      ansible.builtin.set_fact:
+        partitioning_vm_size: >-
+          {{
+            (partitioning_disk_size_bytes.stdout | trim | int / 1024 / 1024 / 1024)
+            | round(2, 'floor')
+          }}