fix: stabilize agent lifecycle, rehire flows, and UI state

[0xTomDaniel]

Summary

This PR ended up being much broader than the original UI-flashing fix. It closes the lifecycle and rehire regressions that were surfacing as flashing, blocked states, stale workflow transitions, and incorrect post-hire metrics across the web agent flows.

• stabilize agent thread lifecycle projection and UI-state boundaries so active runs stop rapidly switching views and flashing in the UI
• harden onboarding, rehire, and command-routing transitions across Pendle, GMX, and CLMM so agents resume cleanly and do not get stuck in stale or blocked states
• tighten fire/run invariants, busy-thread handling, stream retry/teardown behavior, and onboarding resets so firing an agent completes cleanly and transient stream interruptions do not leave the UI in the wrong state
• fix CLMM inherited-position behavior, including stale workflow regressions, post-hire APY/fee computation, and fire handling for pre-existing positions
• fix GMX rehire and execution behavior by using the delegator wallet for perpetual plan building and stabilizing position/session metrics
• fix Pendle workflow correctness by routing through the transition helper, restoring buy PT routing, adding latency instrumentation, and matching market symbols case-insensitively
• expand regression coverage across lifecycle projection, onboarding routing, fire/run commands, poll-cycle behavior, accounting, and Pendle market matching, plus a small web AG UI start/build tooling fix

Closes #455

Test Plan

• Added and updated targeted unit and integration coverage across agent-clmm, agent-gmx-allora, and agent-pendle for the lifecycle, onboarding, fire/run, poll-cycle, accounting, and market-matching regressions addressed here
• pnpm test:ci
• pnpm lint
• pnpm build
• local Pendle hire flow against ONCHAIN_ACTIONS_API_URL=http://localhost:50051