chore: cleanup duplicate trade save, misleading cycle counters, and /api/summary inconsistencies

Bug #5: metrics.record_trade() only delegated to save_trade(), which
executor.execute() already calls — every trade was written twice (deduped
only by ON CONFLICT DO NOTHING). Remove the redundant call and the now-dead
method. RealExecutor.execute() raises NotImplementedError, so real mode is
unaffected.

Bug #6 (CYCLE SUMMARY): manifold accepted/rejected counters only increment
on the active-signal path, so with MANIFOLD_SIGNAL_ENABLED=false they always
printed 0/0 — print 'manifold_signal: disabled' instead.
family_conflicts_prevented duplicated blocked_by_family (same counter
printed twice); removed. gnews_cap was a dead variable with a misleading
comment; removed.

Bug #7 (/api/summary): total_trades was len() over a LIMIT-500 query —
capped once history grows; counts now come from COUNT(*) via
compute_metrics_from_db. cash_available was reimplemented in the API;
extract cash_available() in paper.py (same formula, unchanged) and feed it
from get_open_position_data() — the exact source/helper
PaperExecutor.initialize() uses. Test asserts API and executor report
identical cash for the same DB state.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

bot/main.py

@@ -11,7 +11,12 @@ from bot.data.polymarket import PolymarketClient, Market, market_family_key
 from bot.data.external import ExternalDataClient
 from bot.data.news import NewsClient
 from bot.data.manifold import ManifoldClient
-from bot.strategy.bayesian import BayesianStrategy, gnews_priority, MAX_NEWS_QUERIES_PER_CYCLE
+from bot.strategy.bayesian import (
+    BayesianStrategy,
+    gnews_priority,
+    MAX_NEWS_QUERIES_PER_CYCLE,
+    MANIFOLD_SIGNAL_ENABLED,
+)
 from bot.risk.manager import RiskManager
 from bot.executor.paper import PaperExecutor
 from bot.metrics.tracker import MetricsTracker
@@ -199,7 +204,6 @@ async def run_trading_loop(
                 # 7. Execute (paper)
                 trade = await executor.execute(order)
                 if trade:
-                    await metrics.record_trade(trade)
                     log.info("Trade executed: %s", trade)
                     # Block this family for the rest of the cycle (Phase 2)
                     occupied_families.add(signal.family_key)
@@ -221,7 +225,17 @@ async def run_trading_loop(
                 if denom == 0:
                     return "0% (0/0)"
                 return f"{n * 100 // denom}% ({n}/{denom})"
-            gnews_cap = strategy._news_queries_this_cycle  # already updated by reset below
+
+            # The accepted/rejected counters only increment on the active-signal
+            # path, so with the signal disabled they always print 0/0 — say
+            # "disabled" instead of pretending the matcher found nothing.
+            if MANIFOLD_SIGNAL_ENABLED:
+                manifold_summary = (
+                    f"  manifold_matches_accepted:      {stats['manifold_matches_accepted']}\n"
+                    f"  manifold_matches_rejected:      {stats['manifold_matches_rejected']}"
+                )
+            else:
+                manifold_summary = "  manifold_signal:                disabled"
 
             log.info(
                 "[CYCLE SUMMARY]\n"
@@ -239,9 +253,7 @@ async def run_trading_loop(
                 "  gnews_queries_used:             %d/%d\n"
                 "  reentry_guard_blocked:          %d\n"
                 "  legacy_incomplete_seen:         %d\n"
-                "  family_conflicts_prevented:     %d\n"
-                "  manifold_matches_accepted:      %d\n"
-                "  manifold_matches_rejected:      %d",
+                "%s",
                 n_total,
                 n_uncertainty,
                 stats["max_edge_gross"],
@@ -256,9 +268,7 @@ async def run_trading_loop(
                 stats["gnews_queries_used"], MAX_NEWS_QUERIES_PER_CYCLE,
                 reentry_guard_count,
                 legacy_incomplete_count,
-                stats["skip_family"],
-                stats["manifold_matches_accepted"],
-                stats["manifold_matches_rejected"],
+                manifold_summary,
             )
 
             # 9. Update daily metrics