feat: Enhance currency handling and validation across scenarios

- Updated form template to prefill currency input with default value and added help text for clarity.
- Modified integration tests to assert more descriptive error messages for invalid currency codes.
- Introduced new tests for currency normalization and validation in various scenarios, including imports and exports.
- Added comprehensive tests for pricing calculations, ensuring defaults are respected and overrides function correctly.
- Implemented unit tests for pricing settings repository, ensuring CRUD operations and default settings are handled properly.
- Enhanced scenario pricing evaluation tests to validate currency handling and metadata defaults.
- Added simulation tests to ensure Monte Carlo runs are accurate and handle various distribution scenarios.

services/bootstrap.py

@@ -6,7 +6,11 @@ from typing import Callable
 
 from config.settings import AdminBootstrapSettings
 from models import User
-from services.repositories import ensure_default_roles
+from services.pricing import PricingMetadata
+from services.repositories import (
+    PricingSettingsSeedResult,
+    ensure_default_roles,
+)
 from services.unit_of_work import UnitOfWork
 
 
@@ -27,6 +31,12 @@ class AdminBootstrapResult:
     roles_granted: int
 
 
+@dataclass(slots=True)
+class PricingBootstrapResult:
+    seed: PricingSettingsSeedResult
+    projects_assigned: int
+
+
 def bootstrap_admin(
     *,
     settings: AdminBootstrapSettings,
@@ -127,3 +137,37 @@ def _bootstrap_admin_user(
         password_rotated=password_rotated,
         roles_granted=roles_granted,
     )
+
+
+def bootstrap_pricing_settings(
+    *,
+    metadata: PricingMetadata,
+    unit_of_work_factory: Callable[[], UnitOfWork] = UnitOfWork,
+    default_slug: str = "default",
+) -> PricingBootstrapResult:
+    """Ensure baseline pricing settings exist and projects reference them."""
+
+    with unit_of_work_factory() as uow:
+        seed_result = uow.ensure_default_pricing_settings(
+            metadata=metadata,
+            slug=default_slug,
+        )
+
+        assigned = 0
+        if uow.projects:
+            default_settings = seed_result.settings
+            projects = uow.projects.list(with_pricing=True)
+            for project in projects:
+                if project.pricing_settings is None:
+                    uow.set_project_pricing_settings(project, default_settings)
+                    assigned += 1
+
+    logger.info(
+        "Pricing bootstrap result: slug=%s created=%s updated_fields=%s impurity_upserts=%s projects_assigned=%s",
+        seed_result.settings.slug,
+        seed_result.created,
+        seed_result.updated_fields,
+        seed_result.impurity_upserts,
+        assigned,
+    )
+    return PricingBootstrapResult(seed=seed_result, projects_assigned=assigned)