Implement ADAPTIVE-WP-0002 Sprint 1 economic foundations

Add Coulomb observatory package with JSON registries (product, pricing
models, costs, revenue, membership), economics snapshot engine, Economics
Dashboard v1 CLI, sample report, and pytest coverage. Complete T01 and
queue Sprint 2 Bubble.io integration.

projects/coulomb-pricing/observatory/models.py

@@ -0,0 +1,77 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+from decimal import Decimal
+from typing import Literal
+
+CostCategory = Literal["fixed", "variable"]
+MemberStatus = Literal["active", "churned", "paused"]
+PricingModelStatus = Literal["active", "candidate", "retired"]
+
+
+@dataclass(frozen=True)
+class Product:
+    id: str
+    name: str
+    lifecycle_phase: str
+    currency: str
+    description: str
+    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 CostEntry:
+    id: str
+    name: str
+    category: CostCategory
+    amount: Decimal
+    currency: str
+    cadence: str
+    allocation: str
+
+
+@dataclass(frozen=True)
+class RevenueEntry:
+    id: str
+    period: str
+    gross_amount: Decimal
+    fees_amount: Decimal
+    refunds_amount: Decimal
+    net_amount: Decimal
+    currency: str
+    source: str
+
+
+@dataclass(frozen=True)
+class MembershipRecord:
+    id: str
+    status: MemberStatus
+    joined_at: str
+    plan_id: str
+    churned_at: str | None = None
+
+
+@dataclass(frozen=True)
+class EconomicsSnapshot:
+    period: str
+    currency: str
+    active_members: int
+    monthly_revenue: Decimal
+    monthly_cost: Decimal
+    cost_per_member: Decimal
+    gross_margin: Decimal
+    gross_margin_pct: Decimal
+    pricing_model_count: int
+    revenue_source: str