feat(auth): add support for disabling auth via metadata

- Added logic to set `auth.Disabled` and update `auth.Status` to `StatusDisabled` when `disabled` metadata is provided and true.
- Updated `objectstore`, `gitstore`, and `postgresstore` implementations to handle the new metadata attribute.

Closes: #2651

internal/store/gitstore.go

@@ -497,6 +497,10 @@ func (s *GitTokenStore) readAuthFile(path, baseDir string) (*cliproxyauth.Auth,
 		auth.Attributes["email"] = email
 	}
 	cliproxyauth.ApplyCustomHeadersFromMetadata(auth)
+	if disabled, ok := metadata["disabled"].(bool); ok && disabled {
+		auth.Disabled = true
+		auth.Status = cliproxyauth.StatusDisabled
+	}
 	return auth, nil
 }
 

internal/store/objectstore.go

@@ -604,6 +604,10 @@ func (s *ObjectTokenStore) readAuthFile(path, baseDir string) (*cliproxyauth.Aut
 		NextRefreshAfter: time.Time{},
 	}
 	cliproxyauth.ApplyCustomHeadersFromMetadata(auth)
+	if disabled, ok := metadata["disabled"].(bool); ok && disabled {
+		auth.Disabled = true
+		auth.Status = cliproxyauth.StatusDisabled
+	}
 	return auth, nil
 }
 

internal/store/postgresstore.go

@@ -319,6 +319,10 @@ func (s *PostgresStore) List(ctx context.Context) ([]*cliproxyauth.Auth, error)
 			NextRefreshAfter: time.Time{},
 		}
 		cliproxyauth.ApplyCustomHeadersFromMetadata(auth)
+		if disabled, ok := metadata["disabled"].(bool); ok && disabled {
+			auth.Disabled = true
+			auth.Status = cliproxyauth.StatusDisabled
+		}
 		auths = append(auths, auth)
 	}
 	if err = rows.Err(); err != nil {