feat: Sentinela v0.2.0 — Brazilian Financial Data API in Go

- 20 Go source files, single 16MB binary
- SQLite + FTS5 full-text search (pure Go, no CGO)
- BCB integration: Selic, CDI, IPCA, USD/BRL, EUR/BRL
- CVM integration: 2,524 companies from registry
- Fiber v2 REST API with 42 handlers
- Auto-seeds on first run (~5s for BCB + CVM)
- Token bucket rate limiter, optional API key auth
- Periodic sync scheduler (configurable)
- Graceful shutdown, structured logging (slog)
- All endpoints tested with real data

internal/api/server.go

@@ -0,0 +1,31 @@
+package api
+
+import (
+	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v2/middleware/cors"
+	"github.com/gofiber/fiber/v2/middleware/logger"
+	"github.com/gofiber/fiber/v2/middleware/recover"
+
+	"github.com/sentinela-go/internal/api/middleware"
+	"github.com/sentinela-go/internal/config"
+	"github.com/sentinela-go/internal/db"
+)
+
+func NewServer(cfg *config.Config, database *db.DB) *fiber.App {
+	app := fiber.New(fiber.Config{
+		AppName: "Sentinela API",
+	})
+
+	app.Use(recover.New())
+	app.Use(logger.New())
+	app.Use(cors.New())
+	app.Use(middleware.NewRateLimiter(cfg.RateLimit))
+
+	if cfg.APIKey != "" {
+		app.Use(middleware.NewAPIKeyAuth(cfg.APIKey))
+	}
+
+	RegisterRoutes(app, database)
+
+	return app
+}