feat(omo-senpi): register thread tool family

[code-yeongyu]

Summary

Register the six shipped thread tools in the omo-senpi component barrel and live component list.

Changes

• Added assembled thread tool definitions using the shipped contracts, addressing, reader, receipts, mailbox, and metadata seams.
• Added task-style component factory and registration helper.
• Exported the complete thread barrel and included the component in the production component list.

QA & Evidence

• Focused registration test: GREEN (2 tests), with RED captured in .omo/evidence/thread-tools/registration/red.txt and GREEN in green.txt.
• Existing thread component suite: 113 pass.
• Full typecheck currently has unrelated pre-existing formatter/lsp errors on this dev baseline.
• QA run-alls are captured; they require the external senpi-thread-tools checkout, absent on this workstation.

Risks

• Host adapter is an injected port and the default production component remains inert until the live host launcher supplies it; this PR is the registration seam.

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Summary by cubic

Registers the six thread tools (thread_create, thread_list, thread_read, thread_send, thread_interrupt, thread_handoff) in omo-senpi's production component list. The component now always registers its tools, resolves its socket via the omo agent-home resolver lazily at call time, and returns a typed host_unavailable error when that RPC seam is missing; previously it stayed inert without injected options.

• The thread barrel exports the component factory, registration helper, and tool surfaces; the extension bundle was refreshed.
• The runtime dependency test resolves subpath imports by package name and deduplicates symlink targets.
• Plugin-surface QA proves the built extension loads and the agent can discover and call thread_list.
• Real-host proof shows the six tools register, create-and-send delivers, and unknown targets return the typed not_found error.
• QA run-alls require the external senpi-thread-tools checkout.

^{Written for commit b272058. Summary will update on new commits.}