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>

android/app/proguard-rules.pro

@@ -0,0 +1,7 @@
+# Add project specific ProGuard rules here.
+-keepattributes *Annotation*
+-keep class com.tiangong.aiagent.data.remote.dto.** { *; }
+
+# Bugly
+-dontwarn com.tencent.bugly.**
+-keep public class com.tencent.bugly.** { *; }