Implements SQLite repositories (#180)

* add sqlite db

* add .vscode to gitignore

* add vtxo repo

* add sqlite repos implementations

* add sqlite in db/service

* update go.mod

* fix sqlite

* move sqlite tests to service_test.go + fixes

* integration tests using sqlite + properly close statements

* implement GetRoundsIds

* add "tx" table to store forfeits, connectors and congestion trees

* add db max conn = 1

* upsert VTXO + fix onboarding

* remove json tags

* Fixes

* Fix

* fix lint

* fix config.go

* Fix rm config & open db only once

* Update makefile

---------

Co-authored-by: altafan <18440657+altafan@users.noreply.github.com>

server/internal/infrastructure/db/sqlite/utils.go

@@ -0,0 +1,45 @@
+package sqlitedb
+
+import (
+	"database/sql"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	_ "modernc.org/sqlite"
+)
+
+const (
+	driverName = "sqlite"
+)
+
+func OpenDb(dbPath string) (*sql.DB, error) {
+	dir := filepath.Dir(dbPath)
+	if _, err := os.Stat(dir); os.IsNotExist(err) {
+		err = os.MkdirAll(dir, 0755)
+		if err != nil {
+			return nil, fmt.Errorf("failed to create directory: %v", err)
+		}
+	}
+
+	db, err := sql.Open(driverName, dbPath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to open db: %w", err)
+	}
+
+	db.SetMaxOpenConns(1) // prevent concurrent writes
+
+	return db, nil
+}
+
+func extendArray[T any](arr []T, position int) []T {
+	if arr == nil {
+		return make([]T, position+1)
+	}
+
+	if len(arr) <= position {
+		return append(arr, make([]T, position-len(arr)+1)...)
+	}
+
+	return arr
+}