Internal state persistence (#27)

Allow us to generate year over year reports without having to rerun everything from the beginning.

Co-authored-by: Natercio Moniz <[email protected]>

internal/trading212/record.go

@@ -12,6 +12,7 @@ import (
 
 	"github.com/biter777/countries"
 	"github.com/nmoniz/any2anexoj/internal"
+	"github.com/nmoniz/any2anexoj/internal/ofigi"
 	"github.com/shopspring/decimal"
 )
 
@@ -70,10 +71,10 @@ func (r Record) Nature() internal.Nature {
 
 type RecordReader struct {
 	reader *csv.Reader
-	figi   *internal.OpenFIGI
+	figi   *ofigi.Client
 }
 
-func NewRecordReader(r io.Reader, f *internal.OpenFIGI) *RecordReader {
+func NewRecordReader(r io.Reader, f *ofigi.Client) *RecordReader {
 	return &RecordReader{
 		reader: csv.NewReader(r),
 		figi:   f,
@@ -187,7 +188,7 @@ func (rr RecordReader) ReadRecord(ctx context.Context) (internal.Record, error)
 	}
 }
 
-func figiNatureGetter(ctx context.Context, of *internal.OpenFIGI, isin string) func() internal.Nature {
+func figiNatureGetter(ctx context.Context, of *ofigi.Client, isin string) func() internal.Nature {
 	return sync.OnceValue(func() internal.Nature {
 		secType, err := of.SecurityTypeByISIN(ctx, isin)
 		if err != nil {