test(agent): add growth-hook coverage for claim/drip/splitSend event slugs

[rz1989s]

Background

Final holistic review of PR-E (#269) flagged that growth-hook.test.ts only exercises the send and swap tool paths. The remaining three slugs from TOOL_EVENT_MAP have no test coverage:

• sipher_private_claim_completed (mapped from claim)
• sipher_recurring_send_tick (mapped from drip)
• sipher_batch_send_completed (mapped from splitSend)

If any of these mapping keys ever get a typo (e.g., splitSend → split_send), no test catches it. The fix is mechanical — 3 lines of it.each parametric coverage.

Why it wasn't fixed in PR-E

Two reasons:

1. Scope discipline. PR-E was the canonical-contract rewrite, not a test-coverage expansion.
2. Practical impact gated by sipher#262. claim/drip/splitSend (and send/swap) currently return {status: 'awaiting_signature'} with no tx_signature, so the growth-hook silently no-ops for all of them. Only claim actually emits events today (it forwards its input deposit-tx-signature). The other 4 slugs are dead-on-arrival until sipher#262 is resolved.

So the coverage gap is real but the practical risk is low until #262 ships.

Suggested fix

Inside packages/agent/tests/integrations/torque/growth-hook.test.ts, add a parametric block:

```typescript
describe.each([
{ tool: 'claim', slug: 'sipher_private_claim_completed' },
{ tool: 'drip', slug: 'sipher_recurring_send_tick' },
{ tool: 'splitSend', slug: 'sipher_batch_send_completed' },
])('emits $slug for $tool tool', ({ tool, slug }) => {
it('builds correct event shape', async () => {
baseExecutor.mockResolvedValue({ action: tool, status: 'confirmed', signature: TX_SIG })
const wrapped = wrapExecutorWithGrowthHook(baseExecutor, opts)
await wrapped(tool, { wallet: WALLET, amount: 1, token: 'SOL', recipient: 'rector.sol' })
await new Promise((resolve) => setTimeout(resolve, 0))
expect(emitEventMock).toHaveBeenCalledWith(
expect.objectContaining({ eventName: slug })
)
})
})
```

Three tests, locks the slug mapping.

Priority

Low. Defer until either:

• sipher#262 ships (then these tools actually emit and coverage matters more)
• A general test-hygiene sweep happens

Context

PR-E #269 final holistic review, Minor issue #3.