Python SDK base `Exchange` incorrectly exposes `pre_warm_market`, `get_event_by_id`, `get_event_by_slug` — extends the misclassification pattern of issue #862

[realfishsam]

Gap type

SDK phantom / incorrect exposure (exchange-specific methods on base class)

Summary

Three exchange-specific methods are placed directly on the Python SDK's base Exchange class even though they exist only on a single concrete exchange in core. This is the same misclassification identified for Limitless watch methods in issue #862, extended to Polymarket-specific and Probable-specific methods.

Core

• preWarmMarket(outcomeId) — core/src/exchanges/polymarket/index.ts:219. Only on PolymarketExchange.
• getEventById(id) — core/src/exchanges/probable/index.ts:158. Only on ProbableExchange.
• getEventBySlug(slug) — core/src/exchanges/probable/index.ts:177. Only on ProbableExchange.

None of these are on BaseExchange or any other exchange.

Python SDK

sdks/python/pmxt/client.py

• Line 2888: pre_warm_market(outcome_id) — on base Exchange class
• Line 2901: get_event_by_id(id) — on base Exchange class
• Line 2914: get_event_by_slug(slug) — on base Exchange class

These methods are not narrowed to the Polymarket or Probable subclasses in sdks/python/pmxt/_exchanges.py.

TypeScript SDK

sdks/typescript/pmxt/client.ts — none of these three methods appear on the base Exchange class (they are absent entirely; separate issues #187 and #188 track their absence from the correct TS SDK subclasses).

Expected behaviour

• pre_warm_market should be on Polymarket only (or absent pending issue Polymarket.preWarmMarket() is in core but missing from both SDKs #187)
• get_event_by_id / get_event_by_slug should be on Probable only (or absent pending issue Probable.getEventById() and Probable.getEventBySlug() are in core but missing from both SDKs #188)
• Calling these on any other exchange currently sends the sidecar an unrecognised method and gets a 404/error at runtime with no type-system warning