feat(docs, api): Add Projects Discovery API, deploymentcenter project seed, public web docs endpoint, and minimal agent prompt template

docs/BUGTRACKER_INTEGRATION_GUIDE.md

@@ -49,6 +49,50 @@ Header: `Authorization: Bearer <MASTER_TOKEN>`
 
 ---
 
+## 📂 1.5. Discovering Monitored Projects API
+
+Before reporting a bug or feature request, an agent can dynamically query all registered projects monitored by the Deployment Center.
+
+### Endpoint: `GET /api/bugtracker/v1/projects.php`
+
+#### Response:
+```json
+{
+  "status": "success",
+  "count": 4,
+  "projects": [
+    {
+      "id": 1,
+      "slug": "myapp",
+      "name": "My Application Deluxe",
+      "notes": "Hauptanwendung für Desktop und Server"
+    },
+    {
+      "id": 2,
+      "slug": "polytrader",
+      "name": "PolyTrader Suite Pro",
+      "notes": "Trading- und Handelssystem Client"
+    },
+    {
+      "id": 3,
+      "slug": "predictalytics",
+      "name": "Predictalytics Engine",
+      "notes": "Datenanalyse und Vorhersage Dienst"
+    },
+    {
+      "id": 4,
+      "slug": "deploymentcenter",
+      "name": "Deployment Center",
+      "notes": "Zentrale Verwaltungs- & Update-Plattform"
+    }
+  ]
+}
+```
+
+If an agent discovers an issue or refactoring opportunity in any monitored system (including `deploymentcenter` itself or external dependencies), it can fetch this project list and map the issue to the appropriate `project_slug`.
+
+---
+
 ## 🐛 2. Reporting Bugs, Features & Ideas
 
 ### Endpoint: `POST /api/bugtracker/v1/report.php`