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>

backend/modules/telegram/bot/menus.py

@@ -230,18 +230,17 @@ def create_main_menu(
                 )
             ])
 
-        # Rows 2-4: Financial options (2 buttons per row, made wide by message text padding)
+        # Rows 2-4: Financial options (compact layout with unified Trezorerie button)
         keyboard.extend([
             [
                 InlineKeyboardButton("Sold Companie", callback_data="menu:sold"),
-                InlineKeyboardButton("Trezorerie Casa", callback_data="menu:casa")
+                InlineKeyboardButton("Trezorerie", callback_data="menu:trezorerie")
             ],
             [
-                InlineKeyboardButton("Trezorerie Banca", callback_data="menu:banca"),
-                InlineKeyboardButton("Sold Clienti", callback_data="menu:clienti")
+                InlineKeyboardButton("Sold Clienti", callback_data="menu:clienti"),
+                InlineKeyboardButton("Sold Furnizori", callback_data="menu:furnizori")
             ],
             [
-                InlineKeyboardButton("Sold Furnizori", callback_data="menu:furnizori"),
                 InlineKeyboardButton("Evolutie Incasari", callback_data="menu:evolutie")
             ]
         ])