refactor(backend/domain): get rid of pgx types

backend/internal/domain/entity.go

@@ -3,8 +3,6 @@ package domain
 import (
 	"encoding/json"
 	"time"
-
-	"github.com/jackc/pgx/v5/pgtype"
 )
 
 type User struct {
@@ -29,17 +27,17 @@ type (
 	}
 	CategoryFull struct {
 		CategoryCore
-		CreatedAt time.Time   `json:"createdAt"`
-		Creator   User        `json:"creator"`
-		Notes     pgtype.Text `json:"notes"`
+		CreatedAt time.Time `json:"createdAt"`
+		Creator   User      `json:"creator"`
+		Notes     *string   `json:"notes"`
 	}
 )
 
 type (
 	FileCore struct {
-		ID   string      `json:"id"`
-		Name pgtype.Text `json:"name"`
-		MIME MIME        `json:"mime"`
+		ID   string  `json:"id"`
+		Name *string `json:"name"`
+		MIME MIME    `json:"mime"`
 	}
 	FileItem struct {
 		FileCore
@@ -50,7 +48,7 @@ type (
 		FileCore
 		CreatedAt time.Time       `json:"createdAt"`
 		Creator   User            `json:"creator"`
-		Notes     pgtype.Text     `json:"notes"`
+		Notes     *string         `json:"notes"`
 		Metadata  json.RawMessage `json:"metadata"`
 		Viewed    int             `json:"viewed"`
 	}
@@ -58,9 +56,9 @@ type (
 
 type (
 	TagCore struct {
-		ID    string      `json:"id"`
-		Name  string      `json:"name"`
-		Color pgtype.Text `json:"color"`
+		ID    string  `json:"id"`
+		Name  string  `json:"name"`
+		Color *string `json:"color"`
 	}
 	TagItem struct {
 		TagCore
@@ -71,7 +69,7 @@ type (
 		Category  CategoryCore `json:"category"`
 		CreatedAt time.Time    `json:"createdAt"`
 		Creator   User         `json:"creator"`
-		Notes     pgtype.Text  `json:"notes"`
+		Notes     *string      `json:"notes"`
 		UsedIncl  int          `json:"usedIncl"`
 		UsedExcl  int          `json:"usedExcl"`
 	}
@@ -93,10 +91,10 @@ type (
 	}
 	PoolFull struct {
 		PoolCore
-		CreatedAt time.Time   `json:"createdAt"`
-		Creator   User        `json:"creator"`
-		Notes     pgtype.Text `json:"notes"`
-		Viewed    int         `json:"viewed"`
+		CreatedAt time.Time `json:"createdAt"`
+		Creator   User      `json:"creator"`
+		Notes     *string   `json:"notes"`
+		Viewed    int       `json:"viewed"`
 	}
 )