fix(bridge): propagate caller execution timeout

[drewstone]

Problem

BridgeSeam.timeoutMs only armed Runtime's local reader timer.
Runtime did not put the value in its cli-bridge request, so the bridge substituted its own 300,000ms process cutoff and killed a Pi run even though Runtime specified 14,400,000ms.

Change

• Send the caller's exact BridgeSeam.timeoutMs as execution.timeoutMs on every durable bridge turn.
• Keep Runtime's local timer and explicit durable-run cancellation so transport loss still fails loudly and cleans up the server-owned process.
• Reject invalid values before any bridge request is dispatched.
• Document the public seam contract in generated API docs.

This uses the existing bridgeExecutor, durable run, cancellation, and AgentProfile paths.
It adds no coordinator, request wrapper, compatibility path, or Discovery-local runtime.

Completion criteria

• timeoutMs: 14400000 appears unchanged in the structured bridge request.
• Runtime and cli-bridge act on the same caller-selected number.
• Zero, negative, fractional, and timer-overflow values fail before dispatch.
• Existing local cancellation and durable-run terminal checks remain in force.
• Generated public API documentation is current.
• Branch merges cleanly into current origin/main.

Verification

• After rebasing onto current main: pnpm vitest run tests/runtime/bridge-executor.test.ts — 28 passed.
• After rebasing: pnpm typecheck — pass.
• After rebasing: pnpm docs:check — pass.
• After rebasing: pnpm verify:package — pass, including 22 static-import cases, package lint, exports, 232 shipped-file edge scan, and Worker execution.
• Full suite before the conflict-free rebase: 2,358 passed, 6 skipped across 203 files.

The receiving wire contract and process-lifetime fix are in drewstone/cli-bridge#107.
Both PRs must merge before rerunning the Discovery pursuit.

[tangletools]

✅ Auto-approved drewstone PR — b28b2de9

This PR was opened by the trusted drewstone account.
The full PR reviewer audit still runs separately and will publish findings if it detects issues.

_{tangletools · auto-approval · reason: drewstone_author · 2026-08-03T20:44:17Z}