fix!: remove the dbfs log workaround and require Gitea 1.26.2 (#1395)

Gitea 1.26.2 finalizes logs on an empty `UpdateLog` with `NoMore` (https://github.com/go-gitea/gitea/pull/37687), so the sentinel row is no longer needed. On older servers, the final log of most jobs would never be archived and stays in `dbfs_data`, so this raises the minimum Gitea version. It lives in `ver.MinGiteaVersion`, which the error for servers without `Declare` now names.

Fixes: https://gitea.com/gitea/runner/issues/953
Co-authored-by: silverwind <[email protected]>
Reviewed-on: https://gitea.com/gitea/runner/pulls/1395
Reviewed-by: silverwind <[email protected]>
Co-authored-by: bircni <[email protected]>

internal/pkg/report/reporter_test.go

@@ -355,7 +355,7 @@ func TestReporter_StateNotifyFlush(t *testing.T) {
 	})
 }
 
-func TestReporter_CloseAlwaysSendsRowsWithNoMore(t *testing.T) {
+func TestReporter_CloseFinalizesLogWithoutRows(t *testing.T) {
 	var lastReq atomic.Pointer[runnerv1.UpdateLogRequest]
 	var noMoreCalls atomic.Int64
 
@@ -400,7 +400,7 @@ func TestReporter_CloseAlwaysSendsRowsWithNoMore(t *testing.T) {
 	final := lastReq.Load()
 	require.NotNil(t, final)
 	assert.True(t, final.NoMore, "final UpdateLog must carry NoMore=true")
-	assert.NotEmpty(t, final.Rows, "final UpdateLog must carry at least one row")
+	assert.Empty(t, final.Rows, "a job without output must not get a log row")
 }
 
 func TestReporter_StateHeartbeat(t *testing.T) {