Fix SignalsAPI.stake_get (KeyError on removed totalStake field)

[lingster]

Problem

SignalsAPI.stake_get raised KeyError: 'totalStake' on every call:

data = self.public_user_profile(username)
return data['totalStake']

totalStake was once part of the profile query (added in c4451ec / 6a9819f)
but was dropped when the query was migrated to v2SignalsProfile and then
v3UserProfile. The field no longer exists on the V3UserProfile type at all,
so the lookup always failed.

Fix

Query the current stake field, stakeValue (type Nmr), directly within the
signals tournament and parse it to Decimal, returning None for models with
no stake (instead of raising):

query = '''
  query($model_name: String!, $tournament: Int) {
    v3UserProfile(model_name: $model_name, tournament: $tournament) {
      stakeValue
    }
  }
'''

Testing (red/green TDD)

• New test_stake_get (asserts stakeValue is queried, totalStake is not,
  and the request is scoped to tournament 11) and test_stake_get_no_stake
  (null stake → None). Written failing first.
• Full suite: 44 passed (live-API tests deselected); pyflakes clean.
• Live check: SignalsAPI().stake_get("uuazed") now returns a real
  Decimal instead of raising; an unstaked model returns None.

🤖 Generated with Claude Code

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Query the Signals profile endpoint

In a SignalsAPI call, the username identifies a Signals model; this class and the changelog map Signals profiles to v2SignalsProfile, while v3UserProfile is the Classic profile endpoint. For Signals-only model names this call will not find the model, and for names shared across tournaments it can return the Classic stake instead, so SignalsAPI().stake_get(...) still gives users the wrong result. Use the Signals profile stake field (nmrStaked) instead.

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[lingster]

Superseded by upstream PR numerai#129.