[kartojal]

Adds DIRECTIONAL_SPLIT, DIRECTIONAL_MERGE, THRESHOLD_COMPOSE and THRESHOLD_DECOMPOSE activity types and accepts them in activity filters.

Threshold compose and decompose rows move no collateral, so they report shares and have no amount. These rows used to come back as UnknownActivity, so code that reads amount on every typed row now needs to handle them:

for row in page.items:
    match row:
        case ThresholdComposeActivity() | ThresholdDecomposeActivity():
            print(row.shares)
        case UnknownActivity():
            print(row.raw)
        case _:
            print(row.amount)

The list_activity docstrings on all four clients now say this.

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Note

Low Risk
Additive data-model and parsing changes with tests; no auth, trading, or payment logic touched.

Overview
Adds four range-event wallet activity kinds—DIRECTIONAL_SPLIT, DIRECTIONAL_MERGE, THRESHOLD_COMPOSE, and THRESHOLD_DECOMPOSE—to ActivityType, activity filters, parsing, and public exports.

Directional split/merge rows are modeled as event-level activity with a USDC amount (no per-market condition_id). Threshold compose/decompose rows are tied to a line market (condition_id, outcome) and expose moved tokens as shares instead of collateral amount.

list_activity docs on all sync/async public and secure clients now call out threshold rows and that unrecognized types still deserialize as UnknownActivity with the full payload in raw. Unit tests cover parsing shapes and adjust the generic activity-variant test so threshold types are not forced through the USDC-only path.

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