IPCR Forge: fixes from the holyhorse run

- forge-runner: 1G (act_runner was OOM-killed mid-job at 256M)
- bridge: log rad's stdout on failure; page links Gitea from its own host
  (html_url is the internal address); description fallback without it
- docs/forge.md: holyhorse verification and findings 11-14

forge/state.go

@@ -24,7 +24,6 @@ const (
 type repoState struct {
 	ID            int64     `json:"id"`
 	FullName      string    `json:"full_name"`
-	HTMLURL       string    `json:"html_url,omitempty"`
 	RID           string    `json:"rid,omitempty"`
 	DefaultBranch string    `json:"default_branch,omitempty"`
 	State         string    `json:"state"`