docs: [#28] update staging session with final cleanup status

- Document complete infrastructure cleanup for staging environment
- Record selective deletion of server (106142302) and firewall (2339409)
- Confirm preservation of floating IP (78.47.140.132) and SSH key
- Update next steps for fresh deployment with staging-torrust-demo.com domain
- Document cleanup method using hcloud CLI for selective resource deletion

Author: josecelano

docs/testing/manual-sessions/2025-01-08-issue-28-phase-4-7-staging.md

@@ -418,12 +418,44 @@ floating IP configuration is completed.
 - ✅ All Docker services running healthy
 - ✅ nginx proxy serving HTTPS correctly
 
+### Final Session Status (2025-08-07) - ✅ **CLEANUP COMPLETED**
+
+**Cleanup Decision**: Due to SSL certificate configuration issues encountered during staging
+deployment, the decision was made to start fresh with a new domain: `staging-torrust-demo.com`.
+
+**Cleanup Actions Completed**:
+
+1. **Local Infrastructure State**: ✅ **Removed**
+
+   - Terraform state files backed up and deleted (`terraform.tfstate`, `terraform.tfstate.backup`)
+   - Environment configuration removed (`staging-hetzner-staging.env`)
+   - Generated variables removed (`hetzner-staging.auto.tfvars`)
+
+2. **Hetzner Cloud Resources**: ✅ **Selectively Removed**
+
+   - Server (ID: 106142302) deleted via `hcloud server delete 106142302`
+   - Firewall (ID: 2339409) deleted via `hcloud firewall delete 2339409`
+   - **Preserved Resources**:
+     - Floating IP: 78.47.140.132 (ID: 97062855) ✅ Preserved
+     - IPv6 Floating IP: 2a01:4f8:1c17:a01d::/64 (ID: 97063023) ✅ Preserved
+     - SSH Key: torrust-tracker-staging-key (ID: 100720916) ✅ Preserved
+
+3. **Resource Verification**: ✅ **Confirmed**
+   - Server list: Empty (no servers remaining)
+   - Firewall list: Empty (no firewalls remaining)
+   - Floating IPs: Both IPv4 and IPv6 preserved for reuse
+   - SSH Keys: Staging key preserved for reuse
+
+**Cleanup Method**: Used hcloud CLI with valid token for selective resource deletion
+
+**Environment Ready For**: Fresh staging deployment with new domain `staging-torrust-demo.com`
+
 **Next Steps Required**:
 
-1. Configure floating IP assignment in Hetzner Cloud Console
-2. Update server network configuration to use floating IP
-3. Verify external domain access works correctly
-4. Complete functional testing with proper admin token
+1. Create new environment configuration for `staging-torrust-demo.com` domain
+2. Deploy fresh infrastructure using preserved floating IP (78.47.140.132)
+3. Configure DNS zones for the new staging domain
+4. Complete staging deployment testing with fresh SSL certificate generation
 
 ## Issue #28 Integration