windows-reactor remove unnecessary ops registry thread local

[kennykerr]

No description provided.

[Copilot]

Pull request overview

Removes the windows-reactor attached-prop ops registry thread-local by moving clone/eq behavior into a trait-object vtable, reducing per-thread state and simplifying AttachedProps cloning/equality. Also updates the reactor internals documentation to reflect the removal and clarifies which remaining thread-locals are blocked by the current public free-function API surface.

Changes:

• Replaced AttachedProps storage from Box<dyn Any> + TLS ops registry to Box<dyn AttachedValue> with clone_box/eq_box in the vtable.
• Removed register_ops/ops_for and the OPS_REGISTRY thread_local! from modifiers.rs.
• Updated docs/reactor-internals.md to remove the OPS_REGISTRY entry and note why some TLS values are harder to eliminate.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
docs/reactor-internals.md	Removes OPS_REGISTRY from the thread-local inventory and updates optimization notes to match the new design.
crates/libs/reactor/src/core/modifiers.rs	Eliminates the OPS_REGISTRY thread-local by embedding clone/eq into a trait-object vtable for AttachedProps.