fix: delete agent 500 error + dynamic personality + deployment guide

- Fix delete agent 500: clean up FK records (agent_llm_logs, permissions,
  schedules, executions, team_members) and unbind goals/tasks before delete
- Remove hardcoded personality templates in Android, replace with dynamic
  system prompt generation from name + description
- Set promptSectionsEnabled=false to bypass PromptComposer for personality
- Add Tencent Cloud Linux deployment guide (Docker Compose)
- Accumulated backend service updates, frontend UI fixes, Android app changes

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

grafana/datasources/prometheus.yml

@@ -0,0 +1,19 @@
+# Grafana 数据源配置 — Prometheus
+apiVersion: 1
+
+deleteDatasources:
+  - name: Prometheus
+    orgId: 1
+
+datasources:
+  - name: Prometheus
+    type: prometheus
+    access: proxy
+    url: http://prometheus:9090
+    isDefault: true
+    version: 1
+    editable: false
+    jsonData:
+      timeInterval: 15s
+      queryTimeout: 30s
+      httpMethod: POST