feat(system): README update, API init fix, diagnostic docs, STATUS sync

- README.md: updated to current state (15 branches, 95+ PRs, 733 tests, 173 commands)
- API: init path fixed (creates .env at ~/.secrets/aipass/ not src/aipass/api/)
- API: init shows path and detects existing .env
- devpulse/docs: system_health_report, testing_standards, ai_mail comms upgrade
- STATUS.md: synced via drone @prax status sync

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/aipass/api/apps/modules/api_key.py

@@ -153,9 +153,15 @@ def init_env():
     header("Initialize API Configuration")
     console.print()
 
+    env_path = Path.home() / ".secrets" / "aipass" / ".env"
+
+    if env_path.exists():
+        success(f"Environment file already exists at {env_path}")
+        return
+
     # Create .env template via handler
     if env.create_env_template():
-        success("Environment template created")
+        success(f"Environment template created at {env_path}")
     else:
         error("Failed to create environment template")