feat: Phase 2 + context log — FRED releases, cycle context snapshot, onglet Contexte IA

Phase 2 — Données macro FRED :
- fred_fetcher.py (nouveau) : 7 séries FRED (CPI, NFP, UNRATE, FEDFUNDS, GDP, ICSA,
  spread 10Y-2Y) avec détection direction bullish/bearish et block prompt formaté
- ai_analyzer.py : param fred_block dans suggest + score, injecté dans les deux prompts
- auto_cycle.py : fetch FRED non-bloquant avant la suggestion

Context log — Snapshot du contexte complet :
- database.py : table cycle_context_snapshots + save/get/list fonctions
- auto_cycle.py : sauvegarde le snapshot (meta, news partitionnées, FRED, tech, IV, quotes)
- cycle.py : GET /api/cycle/contexts + GET /api/cycle/contexts/{run_id}
- useApi.ts : hooks useCycleContextSnapshots + useCycleContextSnapshot
- SystemLogs.tsx : onglet "Contexte IA" avec liste de cycles et visualiseur JSON
  par section (cycle_meta, macro, news, FRED, tech) avec accordéon

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/services/ai_analyzer.py

@@ -354,6 +354,7 @@ def score_patterns_with_context(
     risk_context: str = "",
     cycle_meta: Optional[Dict] = None,
     tech_indicators_block: str = "",
+    fred_block: str = "",
 ) -> List[Dict[str, Any]]:
     """Score all patterns with rich context (news, prices, IV, risk clusters) using GPT-4o."""
     if not get_client():
@@ -573,12 +574,14 @@ Instructions de notation:
         )
 
     _tech_sc_section = f"\n{tech_indicators_block}\n" if tech_indicators_block else ""
+    _fred_sc_section = f"\n{fred_block}\n" if fred_block else ""
 
     user = f"""CONTEXTE GLOBAL:
 - Score risque géopolitique: {geo_score.get('score', 50)}/100 ({geo_score.get('level', 'medium')})
 - Top risques: {geo_score.get('top_risks', [])}
 {temporal_section_sc}
 {macro_section}
+{_fred_sc_section}
 {_tech_sc_section}
 TEMPLATE DE NOTATION:
 {scoring_template}
@@ -969,6 +972,7 @@ def suggest_patterns_from_market_context(
     iv_context: str = "",
     cycle_meta: Optional[Dict] = None,
     tech_indicators_block: str = "",
+    fred_block: str = "",
 ) -> List[Dict]:
     """Ask GPT-4o to propose new patterns based on current geo/market + macro regime context."""
     _cycle_meta = cycle_meta or {}
@@ -1115,12 +1119,14 @@ Règles supplémentaires:
     )
 
     tech_block_section = f"\n{tech_indicators_block}\n" if tech_indicators_block else ""
+    fred_section = f"\n{fred_block}\n" if fred_block else ""
 
     user = f"""Tu es un stratège géopolitique et financier senior, expert en options.
 {macro_block}{geo_block}{lessons_block}{reliability_block}{iv_block}
 {temporal_news_block}
 ## Prix des marchés (variation J-1)
 {market_block}
+{fred_section}
 {tech_block_section}
 ## Calendrier économique à venir
 {cal_block}