feat(telegram): Unify Trezorerie button (Casa + Banca combined)

- Replace separate [Trezorerie Casa] and [Trezorerie Banca] buttons
  with single unified [Trezorerie] button in main menu
- Add format_treasury_combined_response() formatter showing:
  - Grand total (Sold Trezorerie)
  - Casa section with total + all accounts
  - Banca section with total + all accounts
- Compact menu layout: Row 2 [Sold Companie][Trezorerie],
  Row 3 [Sold Clienti][Sold Furnizori], Row 4 [Evolutie Incasari]
- Use Romanian number format (period as thousands separator)

Also includes:
- Oracle pool: Support both SERVICE_NAME and SID connections
  (ORACLE_SERVICE_NAME takes priority over ORACLE_SID)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

.auto-build/specs/telegram-trezorerie/SUMMARY.md

@@ -0,0 +1,58 @@
+# Telegram Trezorerie Unification - Quick Summary
+
+## What We're Building
+Replace two separate treasury buttons with one unified button showing complete treasury overview.
+
+## Key Changes
+
+### Menu (Before → After)
+```
+BEFORE:
+Row 2: [Sold Companie] [Trezorerie Casa]
+Row 3: [Trezorerie Banca] [Sold Clienti]
+Row 4: [Sold Furnizori] [Evolutie Incasari]
+
+AFTER:
+Row 2: [Sold Companie] [Trezorerie]
+Row 3: [Sold Clienti] [Sold Furnizori]
+Row 4: [Evolutie Incasari]
+```
+
+### Message Format (New)
+```
+Sold Total Trezorerie: 20,500 RON
+
+Casa
+Sold Total Cash: 5,000 RON
+Conturi de Casa:
+  - Casa Lei: 3,000 RON
+  - Casa Valuta: 2,000 RON
+
+Banca
+Sold Total Banca: 15,500 RON
+Conturi Bancare:
+  - BCR RON: 10,000 RON
+  - BRD EUR: 5,500 RON
+```
+
+## Files to Modify
+
+1. **formatters.py** - Add `format_treasury_combined_response()`
+2. **menus.py** - Update `create_main_menu()` layout (lines 234-247)
+3. **handlers.py** - Add `menu:trezorerie` callback case
+
+## Backward Compatibility
+
+Keep working:
+- `/trezorerie_casa` - shows Casa only
+- `/trezorerie_banca` - shows Banca only
+- `/trezorerie` - shows unified view
+
+## Estimated Time
+2.5 hours total (1h coding, 1h testing, 0.5h review)
+
+## Testing Focus
+- Grand total = Casa + Banca
+- Menu layout compaction
+- Legacy commands still work
+- Performance footer appears