- Inline tool definitions into tools() — no separate definitions()
- Remove dispatch() and dispatch_blocking()
- Remove rpc_blocking helper
- channel_recv/send use spawn_blocking for capnp LocalSet bridge
(same pattern as fetch_all_channels)
- All tool functions private — only tools() is exported
- fetch_all_channels remains pub (used by thalamus screen)
TODO: mind/mod.rs still references thalamus::channels::fetch_all_channels,
should switch to tools::channels::fetch_all_channels.
Co-Authored-By: Proof of Concept <poc@bcachefs.org>
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