refactor(ansible): rename freecad_mcp env vars and rework deployment

- Drop `FREECAD_MCP_` prefix from env vars (use `FREECAD_*`)
- Update freecad_mcp port from 22032 to 22061
- Document that FreeCAD bridge is required for tool calls
- Replace kottos deployment with pallas deployment

ansible/kottos/remove.yml

@@ -0,0 +1,34 @@
+---
+- name: Remove Kottos AI Agent Platform
+  hosts: ubuntu
+  become: true
+
+  tasks:
+    - name: Check if host has kottos service
+      ansible.builtin.set_fact:
+        has_kottos_service: "{{ 'kottos' in services | default([]) }}"
+
+    - name: Skip hosts without kottos service
+      ansible.builtin.meta: end_host
+      when: not has_kottos_service
+
+    - name: Stop and disable kottos service
+      ansible.builtin.systemd:
+        name: kottos
+        state: stopped
+        enabled: false
+      ignore_errors: true
+
+    - name: Remove systemd service file
+      ansible.builtin.file:
+        path: /etc/systemd/system/kottos.service
+        state: absent
+
+    - name: Reload systemd daemon
+      ansible.builtin.systemd:
+        daemon_reload: true
+
+    - name: Remove Kottos directory
+      ansible.builtin.file:
+        path: "{{ kottos_directory }}"
+        state: absent