feat: Implement initial capex calculation feature

- Added CapexComponentInput, CapexParameters, CapexCalculationRequest, CapexCalculationResult, and related schemas for capex calculations.
- Introduced calculate_initial_capex function to aggregate capex components and compute totals and timelines.
- Created ProjectCapexRepository and ScenarioCapexRepository for managing capex snapshots in the database.
- Developed capex.html template for capturing and displaying initial capex data.
- Registered common Jinja2 filters for formatting currency and percentages.
- Implemented unit and integration tests for capex calculation functionality.
- Updated unit of work to include new repositories for capex management.

services/unit_of_work.py

@@ -14,9 +14,11 @@ from services.repositories import (
     PricingSettingsSeedResult,
     ProjectRepository,
     ProjectProfitabilityRepository,
+    ProjectCapexRepository,
     RoleRepository,
     ScenarioRepository,
     ScenarioProfitabilityRepository,
+    ScenarioCapexRepository,
     SimulationParameterRepository,
     UserRepository,
     ensure_admin_user as ensure_admin_user_record,
@@ -39,7 +41,9 @@ class UnitOfWork(AbstractContextManager["UnitOfWork"]):
         self.financial_inputs: FinancialInputRepository | None = None
         self.simulation_parameters: SimulationParameterRepository | None = None
         self.project_profitability: ProjectProfitabilityRepository | None = None
+        self.project_capex: ProjectCapexRepository | None = None
         self.scenario_profitability: ScenarioProfitabilityRepository | None = None
+        self.scenario_capex: ScenarioCapexRepository | None = None
         self.users: UserRepository | None = None
         self.roles: RoleRepository | None = None
         self.pricing_settings: PricingSettingsRepository | None = None
@@ -53,9 +57,11 @@ class UnitOfWork(AbstractContextManager["UnitOfWork"]):
             self.session)
         self.project_profitability = ProjectProfitabilityRepository(
             self.session)
+        self.project_capex = ProjectCapexRepository(self.session)
         self.scenario_profitability = ScenarioProfitabilityRepository(
             self.session
         )
+        self.scenario_capex = ScenarioCapexRepository(self.session)
         self.users = UserRepository(self.session)
         self.roles = RoleRepository(self.session)
         self.pricing_settings = PricingSettingsRepository(self.session)
@@ -75,7 +81,9 @@ class UnitOfWork(AbstractContextManager["UnitOfWork"]):
         self.financial_inputs = None
         self.simulation_parameters = None
         self.project_profitability = None
+        self.project_capex = None
         self.scenario_profitability = None
+        self.scenario_capex = None
         self.users = None
         self.roles = None
         self.pricing_settings = None