signal_log: outcomes for every setup, event dedup, interned news; fix over-scan, dead outlook, panel OPPOSE bias

- seed an advisory outcome on every setup row; same-setup re-logs within 60 min
  are DUPLICATE rows (advisory_event_id); resolver rebuilds bar streams across gaps
- headlines/events interned into news_snapshots (DB 667 MB -> 262 MB); readers
  use signals_with_news / read_news and mode=ro (immutable=1 missed WAL rows)
- post-gate truth columns: gate_reason, actionable, cleaned_warnings, scan_kind,
  config_fingerprint; SELL-hour gates fail closed
- telegram: breach rescan reuses this bar's report; grade dropped from alert
  fingerprint (upgrade-only re-alert)
- market_outlook: hour-bucket dedup (old rule skipped alternate hours), skip heartbeats
- agent_panel: macro-anchored OPPOSE guard (opposed trades were +30R over 3 weeks)
- analyze_signal_log --stored-candles/--parity; backfill + news migration scripts
- tests: Module 25 (analyze_signal_log) + 27 (observability); 429 total

Claude-Session: https://claude.ai/code/session_01FC4s6VCURFte4dub4xKxYL

app_config.py

@@ -101,7 +101,7 @@ _KNOWN_AGENT_PANEL = {
     "candles_enabled", "candle_bars_primary", "candle_bars_confirm",
 }
 _KNOWN_MARKET_OUTLOOK = {"enabled", "telegram", "max_per_day", "candles_bars"}
-_KNOWN_SIGNAL_LOG = {"enabled", "path"}
+_KNOWN_SIGNAL_LOG = {"enabled", "path", "log_blocked_scans"}
 _KNOWN_TELEGRAM = {"token", "chat_id", "channel_id", "alert_min_quality"}
 _KNOWN_SCANNING = {"pairs", "timeframes"}
 _KNOWN_PAIR_KEYS = {"blocked_hours_utc"}
@@ -355,6 +355,10 @@ def load_app_config(path: str = CONFIG_PATH) -> AppConfig:
                            or not slog["path"]):
         raise AppConfigError(
             "config.json: signal_log.path must be a non-empty string")
+    if ("log_blocked_scans" in slog
+            and not isinstance(slog["log_blocked_scans"], bool)):
+        raise AppConfigError(
+            "config.json: signal_log.log_blocked_scans must be true or false")
     app.signal_log_settings = dict(slog)
 
     level = raw.get("log_level", app.log_level)
@@ -478,6 +482,17 @@ def signal_log_enabled(app: Optional[AppConfig] = None) -> bool:
     return bool(app.signal_log_settings.get("enabled", True))
 
 
+def signal_log_blocked_scans(app: Optional[AppConfig] = None) -> bool:
+    """Whether weekend/day-filter early returns are logged (as minimal
+    rows without news/candles). Default ON — they are liveness evidence;
+    turn off to keep the history table to real scans only."""
+    env = os.environ.get("SIGNAL_LOG_BLOCKED_SCANS")
+    if env:
+        return env.strip().lower() in ("1", "true", "yes", "on")
+    app = app or get_app_config()
+    return bool(app.signal_log_settings.get("log_blocked_scans", True))
+
+
 def signal_log_path(app: Optional[AppConfig] = None) -> str:
     """Absolute path to the SQLite signal-history DB. A relative config
     value resolves against the repo root so CWD never matters."""