log instrumentation & test package (#10371)

This PR is part of #4767.

It contains

* add log to federation services
* separat test package for test (fix dependency cycles)

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/10371
Reviewed-by: Mathieu Fenniak <mfenniak@noreply.codeberg.org>
Co-authored-by: Michael Jerger <michael.jerger@meissa-gmbh.de>
Co-committed-by: Michael Jerger <michael.jerger@meissa-gmbh.de>

models/forgefed/federationhost_repository.go

@@ -8,6 +8,7 @@ import (
 	"fmt"
 
 	"forgejo.org/models/db"
+	"forgejo.org/modules/log"
 	"forgejo.org/modules/validation"
 )
 
@@ -16,6 +17,7 @@ func init() {
 }
 
 func GetFederationHost(ctx context.Context, ID int64) (*FederationHost, error) {
+	log.Trace("GetFederationHost: %v", ID)
 	host := new(FederationHost)
 	has, err := db.GetEngine(ctx).Where("id=?", ID).Get(host)
 	if err != nil {
@@ -26,6 +28,7 @@ func GetFederationHost(ctx context.Context, ID int64) (*FederationHost, error) {
 	if res, err := validation.IsValid(host); !res {
 		return nil, err
 	}
+	log.Trace("GetFederationHost: %v, got host %v", ID, host)
 	return host, nil
 }
 

models/user/user_repository.go

@@ -118,6 +118,7 @@ func GetFederatedUserByUserID(ctx context.Context, userID int64) (*User, *Federa
 }
 
 func FindFederatedUserByKeyID(ctx context.Context, keyID string) (*User, *FederatedUser, error) {
+	log.Trace("FindFederatedUserByKeyID: %v", keyID)
 	federatedUser := new(FederatedUser)
 	user := new(User)
 	has, err := db.GetEngine(ctx).Where("key_id=?", keyID).Get(federatedUser)
@@ -140,6 +141,7 @@ func FindFederatedUserByKeyID(ctx context.Context, keyID string) (*User, *Federa
 		return nil, nil, err
 	}
 
+	log.Trace("FindFederatedUserByKeyID: %v found user.ID %v, federated_user %v", keyID, user.ID, federatedUser)
 	return user, federatedUser, nil
 }