refactor: introduce clock to make tests reproducible

internal/service/entry_service.go

@@ -8,6 +8,7 @@ import (
 	"time"
 
 	"github.com/google/uuid"
+	"github.com/wotra/wotra/internal/clock"
 	"github.com/wotra/wotra/internal/domain"
 	"github.com/wotra/wotra/internal/store"
 )
@@ -31,6 +32,7 @@ type EntryService struct {
 	settings   *store.SettingsStore
 	syncStore  *store.SyncStore
 	tz         *time.Location
+	clock      clock.Clock
 }
 
 func NewEntryService(
@@ -39,6 +41,7 @@ func NewEntryService(
 	settings *store.SettingsStore,
 	syncStore *store.SyncStore,
 	tz *time.Location,
+	clk clock.Clock,
 ) *EntryService {
 	return &EntryService{
 		entries:    entries,
@@ -46,11 +49,12 @@ func NewEntryService(
 		settings:   settings,
 		syncStore:  syncStore,
 		tz:         tz,
+		clock:      clk,
 	}
 }
 
 func (s *EntryService) nowMs() int64 {
-	return time.Now().UnixMilli()
+	return s.clock.Now().UnixMilli()
 }
 
 func (s *EntryService) dayKeyForMs(ms int64) string {