fix(ha): fix config replication to standbys; add replConfigPush handler

- config_repl.c: add handle_repl_config_push — standby handler for
  OPCode_replConfigPush. Verifies SHA-256, saves blob to disk via
  conf_save_config, reloads via load_primary_config, ACKs primary.
- config_repl.h: declare handle_repl_config_push.
- cluster.c: dispatch OPCode_replConfigPush to handle_repl_config_push;
  populate c->myhost_info.name from myconf->name (ctrl-1/ctrl-2/ctrl-3)
  instead of the static "controller" placeholder.
- ha.c: fix raft_cb_become_leader push_config_to_standbys call to pass
  real config bytes and tag read from disk (was NULL/0 — standbys got
  empty push and never saved config).
- typemap.h: add raw_sha256/raw_bytes/raw_bytes_len fields to
  repl_config_push_req_t (mirrors upgrade_config_req_t pattern).
- request.c: pre-extract List(UInt8) sha256/bytes from OPCode_replConfigPush
  before capn_free() in xce_decode(); free them in xce_free_request().
- helper.c: add all HA/replication opcode names to xce_request_op_name
  so "unknown opcode 30" becomes "replConfigPush" in logs.
- cluster_def.h: add embedded myhost_info field to cluster_t struct.
- ha.h: declare ha_start_primary_heartbeat; remove dead
  ha_find_and_connect_to_primary declaration.

src/lib/helper.c

@@ -148,6 +148,38 @@ char* xce_request_op_name(xce_request_t* req)
         return "setpreason";
     case OPCode_clrpreason:
         return "clrpreason";
+    case OPCode_heartbeat:
+        return "heartbeat";
+    case OPCode_redirect:
+        return "redirect";
+    case OPCode_steppingDown:
+        return "steppingDown";
+    case OPCode_replEntry:
+        return "replEntry";
+    case OPCode_replAck:
+        return "replAck";
+    case OPCode_replSnapshot:
+        return "replSnapshot";
+    case OPCode_replCatchUpDone:
+        return "replCatchUpDone";
+    case OPCode_replConfig:
+        return "replConfig";
+    case OPCode_replConfigPush:
+        return "replConfigPush";
+    case OPCode_upgradeConfig:
+        return "upgradeConfig";
+    case OPCode_upgradeConfigAck:
+        return "upgradeConfigAck";
+    case OPCode_requestVote:
+        return "requestVote";
+    case OPCode_probeConfigTag:
+        return "probeConfigTag";
+    case OPCode_walAck:
+        return "walAck";
+    case OPCode_walCatchupEntry:
+        return "walCatchupEntry";
+    case OPCode_snapshotTransfer:
+        return "snapshotTransfer";
     default:
         break;
     }