Add CLAUDE.md for Claude Code guidance

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CLAUDE.md

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+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+ROMFASTSQL is an infrastructure and database management project for ROMFAST, featuring:
+- Proxmox virtualization cluster (3 nodes: pve1, pvemini, pveelite)
+- Oracle Database XE 21c with migration support from Oracle 10g
+- AI chatbot system (Flowise + Claude)
+- Disaster recovery infrastructure
+
+## Repository Structure
+
+```
+proxmox/                    # Main infrastructure documentation
+├── README.md               # Master index - START HERE
+├── cluster/                # Proxmox cluster, UPS, storage management
+├── lxc104-flowise/         # AI Chatbot (Flowise on port 3000)
+├── lxc108-oracle/          # Oracle XE 21c/18c Database (port 1521/1522)
+├── lxc171-claude-agent/    # Claude Code development environment
+├── vm109-windows-dr/       # Windows Disaster Recovery VM
+└── vm201-windows/          # Windows 11 (IIS reverse proxy)
+
+system_instructions/        # SQL migration guidelines and knowledge base
+├── system_prompt.md        # SQL migration rules - READ BEFORE WRITING SQL
+└── knowledge_base/         # Example scripts and PACK_MIGRARE.pck
+
+scripts/                    # Python utilities
+├── generare_proces_verbal.py   # Generate assembly minutes (DOCX)
+└── verificare_voturi_AG.py     # Verify assembly votes
+
+input/                      # Oracle DMP files for import
+```
+
+## Key Documentation Entry Points
+
+- **Infrastructure overview**: `proxmox/README.md`
+- **SQL migration guidelines**: `system_instructions/system_prompt.md` (always read before generating migration SQL)
+- **Oracle database setup**: `proxmox/lxc108-oracle/README.md`
+- **Migration orchestration**: `proxmox/lxc108-oracle/migration/00-MASTER-MIGRATION.sh`
+- **Chatbot architecture**: `proxmox/lxc104-flowise/docs/prd.md`
+- **Disaster recovery**: `proxmox/vm109-windows-dr/README.md`
+
+## Infrastructure Commands
+
+### Proxmox Cluster
+```bash
+ssh root@10.0.20.201 "pvecm status"     # Cluster status
+ssh root@10.0.20.201 "pct list"         # List LXC containers
+ssh root@10.0.20.201 "qm list"          # List VMs
+```
+
+### Oracle Database (LXC 108)
+```bash
+pct exec 108 -- docker exec -it oracle-xe sqlplus / as sysdba
+pct exec 108 -- docker restart oracle-xe
+```
+
+### Flowise Chatbot (LXC 104)
+```bash
+pct exec 104 -- systemctl status flowise
+pct exec 104 -- systemctl restart flowise
+pct exec 104 -- journalctl -u flowise -f
+```
+
+### Validation Scripts
+```bash
+# UPS monthly test
+proxmox/cluster/ups/scripts/ups-monthly-test.sh
+
+# SSL certificate monitoring
+proxmox/vm201-windows/scripts/monitor-ssl-certificates.sh
+
+# Oracle backup monitoring
+proxmox/vm109-windows-dr/scripts/oracle-backup-monitor-proxmox.sh
+```
+
+## Network Layout
+
+| Service | IP Address | Port | Purpose |
+|---------|-----------|------|---------|
+| pvemini (main host) | 10.0.20.201 | 8006 | Proxmox GUI |
+| Oracle XE 21c | 10.0.20.121 | 1521 | Production database |
+| Oracle XE 18c | 10.0.20.121 | 1522 | Export compatibility (TSTZ 31) |
+| Flowise | 10.0.20.161 | 3000 | Chatbot UI |
+| Gitea | 10.0.20.165 | 3000 | Git server |
+| Claude Agent | 10.0.20.171 | 22 | Development (also via Tailscale: 100.95.55.51) |
+| Primary Oracle | 10.0.20.36 | 1521 | Windows production |
+| DR Oracle | 10.0.20.37 | 1521 | Disaster recovery |
+
+## SQL Migration Conventions
+
+When writing Oracle migration scripts, follow the naming convention:
+```
+ff_YYYY_MM_DD_##_TYPE.sql
+```
+Where TYPE is: DDL, DML, VIEW, PACK, TRIG, etc.
+
+Always reference `system_instructions/system_prompt.md` for:
+- Oracle 10g compatibility requirements
+- PACK_MIGRARE package usage
+- Migration script patterns and examples
+
+## Custom Claude Code Commands
+
+- `/ultimate_validate_command` - Generate comprehensive validation commands
+- `/plan-handover` - Save implementation plan for session handover
+- `/branch-plan-handover` - Create branch and save plan
+- `/context-handover` - Save context for next session
+
+## Git Workflow
+
+- Remote: `http://gitea:3000/romfast/ROMFASTSQL.git`
+- Main branch: `master`
+- Feature branches merged directly to master