fix(ts-sdk): accept deprecated ids for watchOrderBooks

[realfishsam]

Summary

• Adds TypeScript SDK compatibility for deprecated ids input on watchOrderBooks, matching Python's backwards-compatible behavior.
• Strips params.ids before forwarding sidecar params so the alias does not leak to the server.
• Adds focused Jest coverage for both compatibility forms.

Fixes #1283

Test Plan

• npm test -- --runTestsByPath tests/watch-order-books-compat.test.ts (blocked: generated TypeScript client artifacts are absent in this checkout; pmxt/client.ts cannot resolve ../generated/src/index.js)
• npm run generate:sdk:typescript --workspace=pmxt-core (blocked: environment is missing java, required by openapi-generator-cli)
• git diff --check (pass)

[realfishsam]

Local/CI follow-up from the low-hanging automation:

• Focused change remains scoped to sdks/typescript/pmxt/client.ts plus a Jest regression for SDK drift: Python watch_order_books accepts deprecated ids kwarg with DeprecationWarning; TypeScript watchOrderBooks has no equivalent backward-compat handling #1283.
• Local targeted Jest was blocked before test execution because this checkout lacks generated TypeScript SDK artifacts (pmxt/client.ts cannot resolve ../generated/src/index.js). Attempted npm run generate:sdk:typescript --workspace=pmxt-core, but the cron environment is missing java, which openapi-generator-cli requires. git diff --check passes.
• The red generated-sync checks show broad pre-existing generator drift unrelated to SDK drift: Python watch_order_books accepts deprecated ids kwarg with DeprecationWarning; TypeScript watchOrderBooks has no equivalent backward-compat handling #1283 (hosted client method removal, API reference field drift, exchange coverage drift). Per PMXT focused-PR policy, I did not fold that broad generated churn into this narrow compatibility PR.

[realfishsam]

PR Review: PASS (NOT VERIFIED)

What This Does

Adds backwards-compatible TypeScript handling for deprecated ids inputs to watchOrderBooks, allowing either { ids: [...] } as the first argument or params.ids when outcomeIds is omitted.

Blast Radius

TypeScript SDK WebSocket batch subscription argument shaping only (sdks/typescript/pmxt/client.ts). Core sidecar, OpenAPI, Python SDK, and venue normalizers are not affected.

Consumer Verification

Before (base branch):
watchOrderBooks requires an array and immediately calls .map(resolveOutcomeId) on the first argument. A consumer calling the deprecated shape would fail locally before reaching WebSocket transport:

await client.watchOrderBooks({ ids: ["outcome-1"] } as any)
// base: TypeError because outcomeIds.map is not a function

After (PR branch):
Static review shows the method detects both deprecated shapes, warns, normalizes to an outcome-id array, strips params.ids from forwarded params, and still throws TypeError("Missing required argument: 'outcomeIds'") when no usable array is provided. Added tests assert the outgoing WebSocket args become:

await client.watchOrderBooks({ ids: ["outcome-1"] } as any)
// args: [["outcome-1"]]

await client.watchOrderBooks(undefined, undefined, { ids: ["outcome-1"], foo: "bar" } as any)
// args: [["outcome-1"], undefined, { foo: "bar" }]

Runtime SDK verification was blocked by missing generated SDK artifacts.

Test Results

• Build: PASS (npm run build --workspace=pmxt-core)
• Unit tests: NOT VERIFIED. npx jest -c sdks/typescript/jest.config.cjs sdks/typescript/tests/watch-order-books-compat.test.ts --runInBand failed before tests ran with sdks/typescript/pmxt/client.ts:15:8 - TS2307: Cannot find module '../generated/src/index.js'.
• Server starts: NOT RUN (SDK WebSocket-client argument shaping only)
• E2E smoke: NOT VERIFIED (WebSocket transport mocked by the intended unit test, but generated artifact blocker prevented execution)

Findings

No blocking findings.

PMXT Pipeline Check

• Field propagation (3-layer): N/A
• OpenAPI sync: N/A
• Financial precision: N/A
• Type safety: OK for runtime normalization; full TS compile/test blocked by missing generated imports.
• Auth safety: N/A

Semver Impact

patch -- restores deprecated-call compatibility without changing the preferred public API.

Risk

Deprecated compatibility emits console.warn on each call; high-frequency streaming loops using the deprecated shape could log repeatedly until consumers migrate.