Feat/metrics

[felipemelozx]

Add the metrics endpoint

Introduces a new MetricsController to provide financial analytics for the dashboard. This update includes performance optimizations via database indexes and a seed data generator for development environments.

New Endpoints (MetricsController):

• GET /metrics/monthly-summary: Income vs Expense grouped by month.
• GET /metrics/by-category: Expense breakdown by category and percentage.
• GET /metrics/budgets/performance: Budget vs Actual spending history.
• GET /metrics/overview: High-level dashboard summary (totals, top category, budget status)

Backend & Performance

• Added MetricsService with optimized aggregation logic.
• Created specific database indexes in V20__add_metrics_indexes.sql to speed up metric queries.
• Updated repositories with native queries for performance (using CASE expressions and Projections).

Development

• Implemented SeedDataService to automatically generate realistic test data on startup in dev profile.
• Generators included for Transactions, Budgets, Pots, and Recurring entries.

Testing

• Added unit tests for MetricsService and MetricsController.
• Fixed test dependencies in TransactionSimpleMapperTest.

[sonarqubecloud]

Quality Gate passed

Issues
13 New issues
0 Accepted issues

Measures
0 Security Hotspots
96.3% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud