Implement fin-hub T24-T26: ingest, runway, coupling, RaaS packaging

Add CSV importers, runway calculator, budget alerts, cross-hub coupling
emitters, finhub CLI, and raas-mvp-packaging docs with full test coverage.

src/fin_hub/models/__init__.py

@@ -1,11 +1,13 @@
 """Fin-specific SQLAlchemy models (T23 implementation target)."""
 
 from fin_hub.models.budget import Budget, BurnRate, Commitment, RunwayProjection, TokenSpend
+from fin_hub.models.service_cost import ServiceCost
 
 __all__ = [
     "Budget",
-    "Commitment",
     "BurnRate",
+    "Commitment",
     "RunwayProjection",
+    "ServiceCost",
     "TokenSpend",
 ]

src/fin_hub/models/service_cost.py

@@ -0,0 +1,26 @@
+"""Per-service infrastructure cost attribution (fin→ops coupling)."""
+
+from __future__ import annotations
+
+import uuid
+from datetime import date
+
+from sqlalchemy import Date, Float, String
+from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.orm import Mapped, mapped_column
+
+from hub_core.models.base import Base, TimestampMixin
+
+
+class ServiceCost(Base, TimestampMixin):
+    __tablename__ = "fin_service_costs"
+
+    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    service_id: Mapped[str] = mapped_column(String(128), nullable=False, index=True)
+    environment: Mapped[str] = mapped_column(String(64), nullable=False, default="production")
+    period_month: Mapped[str] = mapped_column(String(7), nullable=False, index=True)
+    amount: Mapped[float] = mapped_column(Float, nullable=False, default=0.0)
+    currency: Mapped[str] = mapped_column(String(3), nullable=False, default="EUR")
+    source: Mapped[str] = mapped_column(String(32), nullable=False)
+    incurred_on: Mapped[date | None] = mapped_column(Date, nullable=True)
+    notes: Mapped[str | None] = mapped_column(String(512), nullable=True)