feat(fase1): export domain-model public API + green full suite (F1)

src/portfolio_optimiser/__init__.py

@@ -1,13 +1,39 @@
 """portfolio-optimiser — generic MAF framework for per-project cost-savings optimization."""
 
-from portfolio_optimiser.run import PortfolioResult, RunResult, run_portfolio, run_project
+from portfolio_optimiser.contracts import GoalConfig, GoalContract, load_goal_config
+from portfolio_optimiser.dimension import Dimension, admits
+from portfolio_optimiser.ledger import (
+    LedgerEntry,
+    RealizationRefused,
+    SavingsLedger,
+    realize,
+)
+from portfolio_optimiser.run import (
+    GoalReached,
+    PortfolioResult,
+    RunResult,
+    run_portfolio,
+    run_project,
+)
 
 __version__ = "0.1.0"
 
 __all__ = [
+    # Portfolio orchestration
     "PortfolioResult",
     "RunResult",
     "run_portfolio",
     "run_project",
+    # Fase 1 domain model
+    "Dimension",
+    "admits",
+    "SavingsLedger",
+    "LedgerEntry",
+    "realize",
+    "RealizationRefused",
+    "GoalContract",
+    "GoalConfig",
+    "load_goal_config",
+    "GoalReached",
     "__version__",
 ]