feat!: remove legacy AMM and upstream-removed fields from gamma models

[kartojal]

Why

Gamma is cleaning the consumer-facing event and market models to improve data transfer speed:

• market.marketMakerAddress will be omitted from responses (still returned for historical AMM markets)
• market.pagerDutyNotificationEnabled is removed from responses
• (event, market, series, tags).requiresTranslation is removed from responses
• event.eventMetadata context keys move to GET events/{id}/insights (no SDK impact: parsed as an open dict)

Unlike the TypeScript SDK, no py-sdk model could fail validation here (extra="ignore", all affected fields optional). This PR removes the dead public surface so consumers stop reading fields that will never carry data again. Companion to ts-sdk#334.

What changed

• EventState.requires_translation, TagReference.requires_translation (inherited by Tag), and SeriesReference.requires_translation (inherited by Series) removed
• MarketMetrics.volume_amm and EventMetrics.liquidity_amm removed
• list_markets: removed the market_maker_addresses filter from all four clients and the internal spec builder (the market_maker_address query param is being dropped)
• Test fixtures no longer carry marketMakerAddress

Compatibility

Responses that still carry any of the removed fields keep parsing; pydantic ignores them silently. A regression test covers this (test_market_ignores_legacy_fields_still_present_in_responses).

Test plan

• uv run ruff check . and uv run ruff format --check . clean
• uv run pyright: 0 errors
• uv run pytest -m "not integration": 2310 passed

🤖 Generated with Claude Code

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Note

Medium Risk
Breaking API for callers using market_maker_addresses or removed model attributes; runtime parsing of responses remains backward-compatible for extra legacy fields.

Overview
Breaking change that aligns the Python SDK with Gamma’s slimmer event/market payloads by dropping dead public surface area.

Removes list_markets support for the market_maker_addresses filter (and the internal market_maker_address query param) across sync/async public and secure clients and list_markets_spec.

Strips optional model fields the API no longer populates: requires_translation on events/tags/series, volume_amm on markets, and liquidity_amm on events—including the corresponding parse_response wiring. Parsing still tolerates legacy keys in JSON via Pydantic extra="ignore"; a new unit test asserts that.

Test fixtures no longer include marketMakerAddress, and paginated spec tests no longer expect that filter in base_params.

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