Implement canonical pricing core and close WP-0003

projects/coulomb-pricing/observatory/models.py

@@ -4,9 +4,20 @@ from dataclasses import dataclass
 from decimal import Decimal
 from typing import Literal
 
+from ._repo_root import ensure_repo_root_on_syspath
+
+ensure_repo_root_on_syspath()
+
+from adaptive_pricing_core.pricing_models import (  # noqa: E402
+    ChargeComponent,
+    Commitment,
+    PricingModel,
+    PricingModelStatus,
+    TunableParameter,
+)
+
 ExpenseClass = Literal["infrastructure", "payment_processing"]
 MemberStatus = Literal["active", "churned", "paused"]
-PricingModelStatus = Literal["active", "candidate", "retired"]
 LiquidityStatus = Literal["burning", "neutral", "generating"]
 
 
@@ -20,18 +31,6 @@ class Product:
     active_pricing_model_id: str
 
 
-@dataclass(frozen=True)
-class PricingModel:
-    id: str
-    name: str
-    model_type: str
-    lifecycle_phase: str
-    currency: str
-    access_fee_amount: Decimal
-    access_fee_cadence: str
-    status: PricingModelStatus
-
-
 @dataclass(frozen=True)
 class ExpenseRecord:
     id: str
@@ -118,4 +117,4 @@ class LiquiditySummary:
     cumulative_net_liquidity: Decimal
     remaining_budget: Decimal
     liquidity_status: LiquidityStatus
-    months_tracked: int
+    months_tracked: int