feat: Multi Driver Registry——drivers.directories Package 扫描装配（V2 PR-4） - #38
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…，§37.3/§8/§41.1） Collector 配置新增 drivers: 段（DriversOptions）： - directories：Driver Package 目录列表，启动时经 driver_package::scan_directories 扫描校验（driver.json 唯一事实来源， §7），逐包加载 NativePlugin 注册进 NativeDriverFactory——同一 Collector 同时注册多个不同 Driver； - isolation_overrides：部署级隔离覆盖（id → 级别），只允许相同或更 严格（低于 Manifest minimum_isolation 启动即拒）；身份元数据不可覆盖； - legacy driver: 段保持反序列化兼容（Option 承载区分显式提供与缺省）， 显式提供时打印 COLLECTOR_CONFIG_DRIVER_DEPRECATED 警告并按既有单插件 路径装配（Transitional §41.1）；与 drivers.directories 互斥（validate 强制）；isolation_overrides 必须配合 directories 使用。 runtime.rs 拆出 synthetic_manifest（Package v2 → ABI v1 加载用 manifest 字段搬运）与 legacy_manifest；Transitional 注记 Host 路径落地后删除。 修复 deploy/profiles/siemens-s7-demo.json 的存量缺陷：bool 属性 plc.motor.running 带 scale=1.0 违反 profile-engine 校验（String/Bytes/ Bool 禁止缩放）——该示例此前从未被测试加载故未暴露。 验收（§37.3）：multi_driver.rs e2e——同一 Collector 经 packages 目录 同时注册 modbus-tcp + s7comm 两包并正常启停；互斥/deprecated 标记/ 隔离覆盖偏序单测。门禁全绿：fmt / check --all-targets --all-features / test --workspace --all-features（869 通过 0 失败）/ clippy -D warnings 0 警告；只读构建复验通过。 Refs: docs/FORGLINK_RUNTIME_V2_IMPLEMENTATION_PLAN.md §37.3、§46
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内容（方案 §37.3 Phase 2，§8/§41.1）
Collector 配置新增
drivers:段directories：Driver Package 目录列表。启动时经driver_package::scan_directories扫描校验（driver.json 唯一事实来源），逐包加载 NativePlugin 注册进 NativeDriverFactory——同一 Collector 同时注册多个不同 Driver。isolation_overrides：部署级隔离覆盖（driver id → 级别）。只允许相同或更严格——低于 Manifestminimum_isolation启动即拒；身份元数据不可覆盖（§8）。driver:兼容（Transitional §41.1）：内部改 Option 承载以区分显式提供与缺省；显式提供时打印COLLECTOR_CONFIG_DRIVER_DEPRECATED并按既有单插件路径装配（synthetic manifest 转换）；与drivers.directories互斥（validate 强制）；isolation_overrides必须配合 directories 使用。存量缺陷修复
deploy/profiles/siemens-s7-demo.json的 bool 属性plc.motor.running带 scale=1.0,违反 profile-engine 校验规则（String/Bytes/Bool 禁止缩放）——该示例此前从未被测试加载故未暴露，本 PR 的多 Driver 测试首次引用它时发现并修复。验收与门禁（§37.3、§39)
tests/multi_driver.rse2e：packages 目录同时注册 modbus-tcp + s7comm 两包,Collector 正常启停driver:可转换并打印 deprecated ✅（既有 e2e 全部继续走该路径回归通过）cargo check -p collector --no-default-features --features collector✅Transitional 说明
legacy
driver:段按 §41.1 保留一个过渡版本，下一 major 删除；synthetic_manifest/legacy_manifest 转换函数在 Host 路径落地（Phase 7+）后随 direct ABI v1 runtime 一并删除。Refs: docs/FORGLINK_RUNTIME_V2_IMPLEMENTATION_PLAN.md §37.3、§46