Phase 0 — De-fusion cleanup

Status: planned. Goal: pure motion inside run_server_inner so phase 1 is a composition change, not a untangling change. No behavior change; verified by diffing startup log lines.

Scope

0.1 Delete the dead dispatch tier

src/rpc/dispatch.rs:10-15 always returns None (module doc says the registry is authoritative). Remove the module and its tier-3 call site in src/core/dispatch.rs::dispatch. src/rpc/ keeps structured_error.rs (still used) — only the dispatch shim dies.

0.2 Extract inline service spawns

Each inline tokio::spawn block in run_server_inner becomes a named function in a new src/core/runtime/services.rs:

Service	Today (approx.)	Extracted fn
Heartbeat + subconscious bootstrap	`jsonrpc.rs:~2083-2110`	`spawn_heartbeat_service(cancel, config)`
Update scheduler	`:~2113`	`spawn_update_scheduler(cancel)`
Cron scheduler (+ proactive-agent seeding, flow schedule-trigger reconcile)	`:~2124-2160`	`spawn_cron_service(cancel, config)`
Channel listeners	`:~2162-2191`	`spawn_channels_service(cancel, config)`

Rules:

Every extracted fn takes the CancellationToken explicitly (today some blocks capture it, some don't — normalize).
Existing gates stay inside the fns for now (config.cron.enabled, config.heartbeat.enabled, OPENHUMAN_DISABLE_CHANNEL_LISTENERS, has_listening_integrations()), so call sites don't change semantics. Phase 1 lifts the selection (should this service exist) to ServiceSet while the fns keep their config gates (is it enabled for this user).
Keep the deliberate asymmetry documented at jsonrpc.rs:2259-2264: the flows trigger subscriber registers at unconditional core boot, not under channels — that stays in bootstrap_core_runtime, not in spawn_channels_service.

0.3 Extract the store-init block

jsonrpc.rs:1807-1892 (memory, whatsapp_data, people, attachments global inits) → fn init_stores(config: &Config, workspace_dir: &Path) -> anyhow::Result<()> in src/core/runtime/context.rs (file seeded here, grows in phase 1/2). Preserve init order exactly; comment each step with the prior jsonrpc.rs line range so the diff is auditable.

Out of scope

Any signature or behavior change to the spawned services themselves.
Touching bootstrap_core_runtime internals (phase 1 moves the call, phase 2/3 decompose it).

Verification

cargo check both crates; pnpm test:rust.
Boot the desktop app and openhuman-core serve; diff the startup log sequence (grep-stable prefixes) against main — must be identical.
rg 'rpc::try_dispatch|rpc/dispatch' returns nothing.

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