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diag(conpty): 句柄类型与 Job 句柄归属观测 (#21) - #246
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The probe reads the system handle table and groups its own handles by type index, so a per-round leak names the type without opening any handle.
…t refs #21 GrantedAccess and the back-trace index precede the type index, so the earlier struct reported access masks instead of object types.
The probe now lists its Job-type handles before, during and after a session and prints the session-owned handle value, so a leak can be compared with it.
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内容
为 #21 的句柄归属问题补上只读观测（不打开、不查询任何外部句柄）：
handle_types_before/afterSystemExtendedHandleInformation）handle_type_namesjob_handles_before/after_start/aftersession_jobSession::job_handle()的值（只读访问器，新增于session.hpp）已取得的结果（Server 2022，run 41018484448）
[][0xf0][0xf0][0xf0, 0x118][0xf0, 0x118][0xf0, 0x118, 0x134][0xf0, 0x118, 0x134][0xf0, 0x118, 0x134, 0x138]本机 Win11：
session_jobstart 出现、close 后消失，before/after 均[]。即：我们自己的
job_每轮都被关闭，残留的是平台每轮复制进来的另一个 Job 句柄。结论已写在 #21。验证
termforge_conpty_probe构建通过；本机 5 个模式全部 passed；类型名映射在本机得到{"7":"Job",...}。边界
DuplicateHandle/不NtQueryObject任何非自建句柄；steady_resources语义；Refs #21