Revert "outposts/proxy: don't save raw jwt in cookie to prevent securecookie: the value is too long"

This reverts commit b3e40c6aed.

internal/outpost/proxyv2/application/claims.go

@@ -13,4 +13,6 @@ type Claims struct {
 	Name              string      `json:"name"`
 	PreferredUsername string      `json:"preferred_username"`
 	Groups            []string    `json:"groups"`
+
+	RawToken string
 }

internal/outpost/proxyv2/application/mode_common.go

@@ -25,6 +25,7 @@ func (a *Application) addHeaders(headers http.Header, c *Claims) {
 	headers.Set("X-authentik-email", c.Email)
 	headers.Set("X-authentik-name", c.Name)
 	headers.Set("X-authentik-uid", c.Sub)
+	headers.Set("X-authentik-jwt", c.RawToken)
 
 	// System headers
 	headers.Set("X-authentik-meta-jwks", a.proxyConfig.OidcConfiguration.JwksUri)

internal/outpost/proxyv2/application/oauth_callback.go

@@ -45,5 +45,6 @@ func (a *Application) redeemCallback(r *http.Request, shouldState string) (*Clai
 	if err := idToken.Claims(&claims); err != nil {
 		return nil, err
 	}
+	claims.RawToken = rawIDToken
 	return claims, nil
 }