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feat: v0.3.23 ABI 对齐与 Ptr/volatile 修复（review #45，冲突取 PR 方） - #47
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按用户裁决把 review PR #45 落到当前 main：冲突取 PR 方；并补回被冲突块吞掉的 开发期不变量（kvspaceWriteInPlace body 指针 8 字节对齐 debug_assert）。 - Ptr 链解析（≤16 跳）、ListLen/ListAt 遍历缓存 O(N)、DelTree 范围 - volatile 跨进程失效与 4 槽环形缓冲（未变槽原地复用） - ctime 变化时退役跨句柄缓存函数条目、Redis 重连与 panic 兜底、fs 原子写 - v0.3.23 ABI 回归测试套件、deps.json 新增 kvspace v0.3.23 pin 已知后果（留档）：body-only 守卫让位后 durable 的 SetPart 无范围校验 （fs pwrite / redis SETRANGE），reserved key 仅 fs 后端检查 —— 见 ci-followups ⑪。 Co-Authored-By: Claude Code <noreply@anthropic.com>
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把 review PR #45 落到当前
main，冲突一律取 PR 方（用户裁决），并补回一个被吞掉的开发期不变量。做法
main（7c48cae，含 #46 SetPart 范围校验）上应用 coding4 的解冲突整树 patch（22 文件 +1998/−725）。冲突：
src/ffi.rs两处取 PR（SetPart的 Ptr 解析 + 后端调用、WriteInPlace的pending_key = target_key）；WriteNewPlace非冲突区自动合并。补回的不变量（独立小改，不影响 PR 语义）
kvspaceWriteInPlace的debug_assert!(body_ptr % 8 == 0)在取 PR 方时被删且无替代，本提交加回（debug 构建断言、release 零开销）：body 指针供调用方直接写 8 字节标量，
对齐是前条件不是假设。
验证
cargo test --release --offline— 全部 suite 绿，合计 51 passed / 0 failed（lib 34、deltree 1、cp 2、list_cache 2、map_coord 2、metadata_fs 2、prefix_list 3、
read_cache 3、review_fixes 2，另若干 0 用例 suite）。
作者报 lib 34 passed、rc=0，一致。
⚠ 已知后果（必须随提交留档）
body-only 守卫让位后：durable 的
SetPart完全无范围校验（fs 走 pwrite、redis 走SETRANGE），reserved key 只在 fs 后端检查、redis 没有。attr/head 保护现在只靠调用方自律。
详见 ci-followups ⑪。
🤖 Generated with Claude Code