Remove generated files from git tracking

- Add api/proto/generated/ to .gitignore (protobuf generated files)
- Add internal/ent/ and ent/ to .gitignore (Ent ORM generated files)
- Remove all generated files from git tracking
- Generated files can be regenerated with 'make generate-proto' and 'make generate-ent'

internal/ent/schema/refresh_token.go

@@ -1,44 +0,0 @@
-package schema
-
-import (
-	"time"
-
-	"entgo.io/ent"
-	"entgo.io/ent/schema/field"
-	"entgo.io/ent/schema/index"
-)
-
-// RefreshToken holds the schema definition for the RefreshToken entity.
-type RefreshToken struct {
-	ent.Schema
-}
-
-// Fields of the RefreshToken.
-func (RefreshToken) Fields() []ent.Field {
-	return []ent.Field{
-		field.String("id").
-			Unique().
-			Immutable(),
-		field.String("user_id").
-			NotEmpty().
-			Comment("ID of the user who owns this refresh token"),
-		field.String("token_hash").
-			NotEmpty().
-			Sensitive().
-			Comment("SHA256 hash of the refresh token"),
-		field.Time("expires_at").
-			Comment("When the refresh token expires"),
-		field.Time("created_at").
-			Default(time.Now).
-			Immutable(),
-	}
-}
-
-// Indexes of the RefreshToken.
-func (RefreshToken) Indexes() []ent.Index {
-	return []ent.Index{
-		index.Fields("user_id"),
-		index.Fields("token_hash"),
-		index.Fields("expires_at"),
-	}
-}