Live path: config-driven multi-pair scanning (Telegram bot + CLI)

- telegram_bot: SCAN_PAIRS/_WS_TO_PAIR/SCAN_BUTTONS all derive from
  PlatformConfig.scan_pairs (the single pair on/off switch); buttons and
  keyboards are generated per pair; _run_signal_sync builds per-pair
  configs via pair_signals factories (was: XAU defaults for any symbol);
  scan-all works per pair; PB badge matches any *_PB tag; daily-rotating
  file logs in logs/telegram.log (30-day retention)
- main.py: --pair argument (XAUUSD | EURUSD + aliases) routed through
  pair_signals factories; price display is precision-aware (2dp gold,
  5dp FX)

scan_pairs default stays [XAUUSD] until the EUR M5 re-tune validates.

test_all.py

@@ -1415,6 +1415,7 @@ def _():
 @test("build_config sets correct timeframe and confirmations")
 def _():
     class FakeArgs:
+        pair = "XAUUSD"
         timeframe = "H4"
     config = build_config(FakeArgs())
     assert config.primary_timeframe == Timeframe.H4
@@ -1426,11 +1427,23 @@ def _():
 def _():
     for tf_str in ["M5", "M15", "M30", "H1", "H4", "D1"]:
         class FakeArgs:
+            pair = "XAUUSD"
             timeframe = tf_str
         config = build_config(FakeArgs())
         assert config.primary_timeframe is not None
 
 
+@test("build_config resolves EURUSD pair to EUR factory config")
+def _():
+    class FakeArgs:
+        pair = "EURUSD"
+        timeframe = "M15"
+    config = build_config(FakeArgs())
+    assert config.symbol == "EUR/USD"
+    assert config.pip_value == 0.0001
+    assert config.primary_timeframe == Timeframe.M15
+
+
 # ══════════════════════════════════════════════════════════════════════
 #  MODULE 7: telegram_bot.py
 # ══════════════════════════════════════════════════════════════════════
@@ -1609,10 +1622,13 @@ def _():
 
 @test("SCAN_BUTTONS and SCAN_LOOKUP consistency")
 def _():
-    assert len(SCAN_BUTTONS) == 5  # 4 TFs + "Scan All"
+    from telegram_bot import SCAN_PAIRS
+    # 4 TF buttons + one "Scan All" per scanned pair
+    assert len(SCAN_BUTTONS) == 5 * len(SCAN_PAIRS)
     for btn in SCAN_BUTTONS:
         assert btn["cb"] in SCAN_LOOKUP
         assert "symbol" in btn
+        assert btn["symbol"] in SCAN_PAIRS
         assert "tf" in btn
         assert "label" in btn
 
@@ -1642,8 +1658,11 @@ def _():
     _level_cache_ts.clear()
 
 
-@test("_WS_TO_PAIR mapping is correct")
+@test("_WS_TO_PAIR mapping covers every scanned pair")
 def _():
+    from telegram_bot import SCAN_PAIRS
+    for p in SCAN_PAIRS:
+        assert _WS_TO_PAIR[PAIR_INFO[p]["display"]] == p
     assert _WS_TO_PAIR["XAU/USD"] == XAUUSD