resources: XCE_RESF_BUILTIN 从未被置位 — resources.yaml 加 builtin: true 声明式键

XCE_RESF_BUILTIN (0x01) 在生产链路上从未被任何一层置位：全树只有 types.h
定义、scheduler repl_info.c 显示表、一个测试 fixture 三处引用。worker
init_builtin_load_indices()（mem/io/r1m…）、controller add_hostattrs_resvals()/
set_host_slots() 硬编码生产这些资源的值，但定义的 flags 从 YAML→capnp→wire
全程没人打这个位——CLI 的 BUILTIN 列对 mem/io/slots 等恒显 false，与 extlic
等用户资源无法区分。

- resources.schema.json（+xceadmin 打包副本，构建时从 src/configs/schema
  同步）：加 builtin: boolean 键
- mapping.py：RESOURCE_FLAG_BUILTIN=0x01，_build_resource 映射 builtin:true
  （与 consumable/release 同模式：缺省/false 不置位）
- build.py dump：补渲染 builtin=True；顺手补同样一直缺失的 external=True
  （此前 EXTERNAL 池 dump 只显示 shared=true）
- src/configs/resources.yaml：20 个硬编码生产者资源（slots + 11 load index
  + 8 host attributes）声明 builtin: true
- golden fixture full/expected.bin 相应再生（6696→6856B，diff 恰为 20 行
  builtin=True，非 builtin 行 0 差异）

验证：xceadmin 389 测试全绿（dev venv + meson build.dbg 各一遍）；t1 实证：
树内 venv 重建 cluster.bin（与 live 逐行比对确认 delta 仅 builtin 20 行）→
config push gen=17 → apiserver 重启拾取（定义 store 只吃 join 时 config
push，激活只 re-push scheduler）→ xcecli definition list -l mem/io/slots
BUILTIN=true，extlic false、distribution/extlic 值/liccheck 作业 RUN→DONE
全链正常，5 daemon 健康。

Co-Authored-By: Claude Code <noreply@anthropic.com>

src/xceadmin/tests/test_config_dump.py

@@ -49,6 +49,32 @@ def test_dump_lists_each_resource_with_decoded_type_and_order(full_cluster_bin):
     assert "consumable=False" in text
 
 
+def test_dump_renders_builtin_and_external_flags(full_cluster_bin):
+    """The flag bits that change a resource's semantics must be visible in a
+    dump: builtin (worker/controller hardcode the values -- the repo fixture's
+    load indices and host attributes) and external (values come only from the
+    extres daemon's pushes -- the extlic pool shape). Both were silently
+    invisible before: every builtin resource dumped as a plain user resource,
+    and an external pool dumped as bare shared=true.
+    """
+    text = build.dump_cluster_config(str(full_cluster_bin))
+    mem_line = next(l for l in text.splitlines() if "name=mem type=numeric" in l)
+    assert "builtin=True" in mem_line
+    # a user-declared resource must not show a bare "builtin=" at all
+    assert "builtin=False" not in text
+
+    import yaml as _yaml
+    configs = str(FIXTURES_DIR / "full" / "configs")
+    with open(configs + "/resources.yaml", encoding="utf-8") as fh:
+        names = [r["name"] for r in _yaml.safe_load(fh)["resources"]
+                 if (r.get("resourcemap") or []) and
+                 (r["resourcemap"][0].get("location") or []) == ["external"]]
+    assert names, "fixture must contain an external resource for this test"
+    for name in names:
+        line = next(l for l in text.splitlines() if f"name={name} " in l)
+        assert "external=True" in line, line
+
+
 def test_dump_renders_mxj_auto_detect_sentinel_not_raw_uint32(full_cluster_bin):
     """The exact bug that motivated this feature: hosts.yaml's `default`
     host has `max_slot: -1`, which wire-encodes as HOSTCONFIG_MXJ_AUTO_DETECT