Add investigation summary and finalize documentation

Co-authored-by: dcasati <3240777+dcasati@users.noreply.github.com>

Author: Copilot

.github/workflows/post-analysis-comment.yml

@@ -22,6 +22,7 @@ jobs:
       - name: Post Analysis Comment
         uses: actions/github-script@v7
         with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
           script: |
             const commentBody = `## 🔍 Root Cause Analysis
 

INVESTIGATION_SUMMARY.md

@@ -0,0 +1,149 @@
+# Investigation Summary - ArgoCD Deployment Failure
+
+## Issue #12: 🚨 ArgoCD Deployment Failed: 2-broken-apps
+
+**Status:** ✅ Root cause identified  
+**Investigation Date:** 2026-02-03  
+**Application:** `2-broken-apps`  
+**Cluster:** `aks-eastus2`  
+**Namespace:** `default`
+
+---
+
+## 🎯 Key Findings
+
+### Two Critical Issues Identified in External Repository
+
+The deployment failure is caused by errors in the manifest file from the external repository:  
+`https://github.com/dcasati/argocd-notification-examples.git`
+
+#### Issue 1: Invalid Kubernetes apiVersion
+- **File:** `apps/broken-aks-store-all-in-one.yaml`
+- **Line:** 178
+- **Current:** `apiVersion: apps/v`
+- **Expected:** `apiVersion: apps/v1`
+- **Impact:** ArgoCD cannot sync - Kubernetes rejects the malformed resource definition
+
+#### Issue 2: Typo in Container Image Name
+- **File:** `apps/broken-aks-store-all-in-one.yaml`
+- **Line:** 475
+- **Current:** `ghcr.io/azure-samples/aks-store-demo/store-dmin:2.1.0`
+- **Expected:** `ghcr.io/azure-samples/aks-store-demo/store-admin:2.1.0`
+- **Impact:** Pod fails to start - image doesn't exist in registry
+
+---
+
+## 📝 Documentation Created
+
+This investigation has produced the following deliverables:
+
+### 1. Detailed Analysis Document
+**File:** `ARGOCD_FAILURE_ANALYSIS.md`
+- Complete root cause analysis
+- Three remediation options with pros/cons
+- Step-by-step verification procedures
+- All necessary commands and examples
+
+### 2. Automated Comment Posting
+**File:** `.github/workflows/post-analysis-comment.yml`
+- GitHub Actions workflow to post analysis to issue #12
+- Can be manually triggered from Actions tab
+- Requires no local setup
+
+### 3. Shell Script for Manual Posting
+**File:** `scripts/post-analysis-to-issue.sh`
+- Executable script using GitHub CLI
+- Can be run locally with proper authentication
+- Includes validation checks
+
+### 4. Usage Documentation
+**File:** `scripts/README.md`
+- Instructions for all posting methods
+- Prerequisites and troubleshooting
+- Quick reference guide
+
+---
+
+## 🚀 Recommended Actions
+
+### Immediate Next Step
+Post the analysis comment to issue #12 using one of these methods:
+
+1. **GitHub Actions (Easiest)**
+   - Navigate to: Actions → "Post Root Cause Analysis Comment"
+   - Click "Run workflow"
+   - Enter issue number: `12`
+   - Click "Run workflow" button
+
+2. **GitHub CLI (If Available)**
+   ```bash
+   cd /path/to/agentic-platform-engineering
+   ./scripts/post-analysis-to-issue.sh
+   ```
+
+3. **Manual Copy-Paste**
+   - Open `ARGOCD_FAILURE_ANALYSIS.md`
+   - Copy content (excluding References section)
+   - Paste as comment on issue #12
+
+### After Posting to Issue
+Work with the external repository owner to fix the issues:
+
+1. **Contact Repository Owner**
+   - Reach out to @dcasati
+   - Or submit a pull request to: https://github.com/dcasati/argocd-notification-examples
+
+2. **Fix Required**
+   - Line 178: Change `apiVersion: apps/v` → `apiVersion: apps/v1`
+   - Line 475: Change `store-dmin:2.1.0` → `store-admin:2.1.0`
+
+3. **Verify Fix**
+   ```bash
+   argocd app sync 2-broken-apps
+   kubectl get pods -n default
+   argocd app get 2-broken-apps
+   ```
+
+---
+
+## 📊 Impact Assessment
+
+### Current State
+- ❌ Application health: **Degraded**
+- ❌ Sync status: **OutOfSync**
+- ❌ Deployment: **Failed**
+- ⚠️ Error: "one or more synchronization tasks are not valid"
+
+### After Fix
+- ✅ Application health: **Healthy**
+- ✅ Sync status: **Synced**
+- ✅ All pods: **Running**
+- ✅ Services: **Available**
+
+---
+
+## 🔗 Reference Links
+
+- **Issue:** https://github.com/DevExpGbb/agentic-platform-engineering/issues/12
+- **External Repo:** https://github.com/dcasati/argocd-notification-examples
+- **Problematic File:** `apps/broken-aks-store-all-in-one.yaml`
+- **ArgoCD Config:** `Act-3/argocd-test-app.yaml`
+
+---
+
+## ✅ Investigation Checklist
+
+- [x] Analyzed ArgoCD application configuration
+- [x] Cloned and inspected external repository
+- [x] Identified root causes (2 issues found)
+- [x] Documented detailed remediation steps
+- [x] Created automated posting workflow
+- [x] Created manual posting script
+- [x] Provided verification procedures
+- [x] Documented all findings comprehensively
+
+---
+
+**Investigation completed by:** Copilot Agent  
+**Date:** 2026-02-03  
+**Duration:** Complete analysis with tools and documentation