Major refactor: Fantabeto 26/27 — modular package, GBM ensemble, MILP/MCTS optimization

Phase 1: Data Engineering
- Refactored notebooks into src/{scraper,features,models,optimization,bot}
- FBref scraper with proxy rotation + Playwright Cloudflare bypass
- Fantacalcio.it integrated scraper (authenticated API + HTML fallback)
- api-football RapidAPI client for supplementary xG/xA/injuries
- RAG news pipeline: Gazzetta, Sky Sport, Di Marzio → injury/suspension/tactical extraction
- 26/27 season config: teams, scoring rules, name mappings, news sources

Phase 2: SOTA ML Architecture
- GBM Ensemble (LightGBM + CatBoost + XGBoost) with stacked blending
- Bootstrap ensemble for uncertainty quantification
- SinhArcsinh distribution head (ported from original TF Probability)
- Card classifiers (yellow/red), penalty model, goal probability (Poisson)
- Temporal GNN for player interaction modeling (crosses→goals, passes→assists)
- Optuna hyperparameter tuning with time-series CV

Phase 3: Operations Research
- Auction solver: MILP knapsack with PuLP (budget + role constraints)
- Grid Auction (Asta a Griglia): Minimax game theory bidding strategy
- Weekly lineup optimizer: MCTS maximizing win probability vs opponent
- Modificatore Difesa integration + captain selection
- Transfer market analyzer: buy-low/sell-high via xG regression to mean
- Opponent behavior modeling from historical lineage patterns

Phase 4: Agentic Workflow
- Telegram bot: auto-briefing (Friday + Sunday morning)
- Tactical briefing generator with start/sit recommendations
- GitHub Actions CI/CD: scheduled pipeline (scrape → predict → notify)

Infrastructure:
- 31 pytest unit tests (features, models, scraper, optimization)
- requirements.txt (lightgbm, catboost, xgboost, optuna, pulp, playwright, langchain)
- Makefile with install/test/lint/scrape/train/bot targets
- Jupyter notebook: 26_27_strategy.ipynb demonstrating auction + matchday 1 mockup
- Completely rewritten README.md with architecture diagram

config/26_27_teams.yaml

@@ -0,0 +1,42 @@
+# 2026/27 Serie A teams
+# Promoted teams subject to confirmation. Update after final Serie B playoff.
+teams:
+  - Atalanta
+  - Bologna
+  - Cagliari
+  - Como
+  - Empoli
+  - Fiorentina
+  - Frosinone
+  - Genoa
+  - Inter
+  - Juventus
+  - Lazio
+  - Lecce
+  - Milan
+  - Monza
+  - Napoli
+  - Parma
+  - Roma
+  - Sassuolo
+  - Torino
+  - Udinese
+
+# Promoted from Serie B 2025/26 (tentative)
+promoted_2026_27:
+  - Frosinone
+  - Genoa
+  - Sassuolo
+
+# Relegated after 2025/26
+relegated_2025_26:
+  - Venezia
+  - Hellas Verona
+  - Salernitana
+
+fantacalcio_api:
+  season_id_current: 21       # 2026/27
+  season_id_last: 20          # 2025/26 (complete)
+  season_id_previous: 19      # 2024/25
+  season_id_older: 18         # 2023/24
+  base_url: "https://www.fantacalcio.it/api/v1/Excel"