chore: rename Go module path gitea.d-ma.be → git.d-ma.be

Infra ADR-0004 renamed the Gitea host. Bulk replace across go.mod and
all .go import paths. Build and tests pass unchanged.

Closes #20

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Dt6aHEDWRjkK14Voi6HnGh

internal/adapters/secrets/file.go

@@ -18,7 +18,7 @@ import (
 	"path/filepath"
 	"sync"
 
-	"gitea.d-ma.be/mathias/tapir/internal/ports"
+	"git.d-ma.be/mathias/tapir/internal/ports"
 )
 
 // FileStore is a SecretStore backed by a single 0600 JSON file mapping opaque

internal/adapters/secrets/file_test.go

@@ -7,7 +7,7 @@ import (
 	"path/filepath"
 	"testing"
 
-	"gitea.d-ma.be/mathias/tapir/internal/adapters/secrets"
+	"git.d-ma.be/mathias/tapir/internal/adapters/secrets"
 )
 
 func TestPutThenGet(t *testing.T) {