fix(verify): per-contact context in output, demote duplicate stanza-id to debug

src/database_flatfile_verify.c

@@ -211,9 +211,13 @@ _first_pass(FILE* fp, const char* basename,
 
         if (pl->stanza_id && pl->stanza_id[0] != '\0') {
             if (g_hash_table_contains(seen_stanza_ids, pl->stanza_id)) {
-                *issues = g_slist_prepend(*issues,
-                                          _issue_new(INTEGRITY_WARNING, basename, lineno,
-                                                     g_strdup_printf("Duplicate stanza-id \"%s\"", pl->stanza_id)));
+                // Older clients (Pidgin, Adium, even early Profanity)
+                // sometimes reuse client-generated stanza-ids across
+                // distinct messages, so a collision is not a real
+                // integrity defect — log it for diagnostics but don't
+                // surface it through /history verify.
+                log_debug("flatfile verify: duplicate stanza-id \"%s\" at %s:%d",
+                          pl->stanza_id, basename, lineno);
             } else {
                 g_hash_table_insert(seen_stanza_ids, g_strdup(pl->stanza_id), GINT_TO_POINTER(lineno));
             }
@@ -302,7 +306,13 @@ _verify_contact_dir(const char* cdir_path, GSList** issues)
         return;
     }
 
-    const char* basename = "history.log";
+    // Reconstruct the contact JID from the directory name so issue reports
+    // identify which contact the problem belongs to (every contact has its
+    // own history.log, so the bare filename is ambiguous).
+    auto_gchar gchar* dir_name = g_path_get_basename(cdir_path);
+    auto_gcharv gchar** parts = g_strsplit(dir_name, "_at_", -1);
+    auto_gchar gchar* contact_jid = g_strjoinv("@", parts);
+    auto_gchar gchar* basename = g_strdup_printf("%s/history.log", contact_jid);
 
     _check_permissions(filepath, basename, issues);