docs(clienti): index ROMPETROL ENERGY ORA-12954 PDB recreation case

Add a top-level case index at lxc108-oracle/clienti/README.md and a
narrative README inside oracle-xe-21c/ that names ROMPETROL ENERGY
explicitly, describes symptom -> diagnostic -> what failed -> what
worked, and lists each numbered SQL with its role in the import phases.

Wire the case into discoverable entry points:
- proxmox/lxc108-oracle/README.md: new "clienti/" subsection
- proxmox/README.md: tree + nav links
- /workspace/romfastsql/CLAUDE.md: entry points

Future "Rompetrol Energy" / "ORA-12954" / "recreare PDB" searches now hit
the docs from the master indices instead of via grep on schema name.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

proxmox/README.md

@@ -38,6 +38,10 @@ proxmox/
 │   │   ├── README.md
 │   │   ├── 00-MASTER-MIGRATION.sh
 │   │   └── ...
+│   ├── clienti/                       # Cazuri concrete clienți (depanare/recreare DB)
+│   │   ├── README.md                  # Index cazuri
+│   │   └── oracle-xe-21c/             # ROMPETROL ENERGY: recreare PDB după ORA-12954
+│   ├── roa-windows-setup/             # Scripturi setup ROA pe Windows + Oracle 21c
 │   └── sql/
 │       ├── roa/                       # SQL-uri Oracle 10g compatibilitate
 │       └── roa-romconstruct/          # Package PACK_CONTAFIN
@@ -403,6 +407,8 @@ ssh root@10.0.20.201 "qm snapshot 302 pre-test --description 'Before ROA test'"
 - **Restart Oracle** → `lxc108-oracle/README.md` → "Restart Oracle"
 - **Scripturi migrare 10g→21c** → `lxc108-oracle/migration/README.md`
 - **SQL-uri Oracle 10g** → `lxc108-oracle/sql/roa/`
+- **Cazuri clienți (depanare/recreare DB)** → `lxc108-oracle/clienti/README.md`
+- **Caz ROMPETROL — recreare PDB Oracle XE 21c (ORA-12954)** → `lxc108-oracle/clienti/oracle-xe-21c/README.md`
 
 ### Windows VM 109 - Disaster Recovery
 - **Configurez RMAN backup** → `vm109-windows-dr/README.md`