Add public_user_profile to Crypto API (resolve model_id by name)

[lingster]

Problem

submission_scores (and diagnostics, staking, etc.) require a model_id,
but the Crypto API had no way to resolve a model name → model_id.
public_user_profile existed only on NumerAPI (Classic) and SignalsAPI,
so there was no supported path to map the usernames shown on the crypto
leaderboard to the UUIDs the rest of the API expects.

Fix

The v3UserProfile GraphQL field accepts a tournament argument that
disambiguates a model name within a tournament. The old Classic/Signals
implementations ignored it — meaning a name shared across tournaments could
resolve to the wrong model's id (verified: quixotic15 returns a
different id with vs. without tournament=12).

This unifies all three tournaments into a single
base_api.Api.public_user_profile that passes tournament=self.tournament_id:

• ✅ CryptoAPI gains public_user_profile (tournament 12) — the missing piece
• ✅ Signals / Classic now resolve names within their own tournament (11 / 8)
• ✅ duplicated overrides in numerapi.py and signalsapi.py removed (DRY)

Return shape is unchanged (id, username, startDate, bio, nmrStaked).

Usage

import numerapi
capi = numerapi.CryptoAPI()
model_id = capi.public_user_profile("nosaailgbmmean")["id"]
scores = capi.submission_scores(model_id)

Testing (red/green TDD)

• New tests in test_cryptoapi.py and test_signalsapi.py assert the model
  is resolved within the API's own tournament and that string fields are
  converted. Written failing first, then made to pass.
• Full suite: 45 passed (live-API tests deselected). pyflakes clean.

Independently verified against the live API + Numerai MCP

check	result
MCP v3_user_profile (no tournament) for a crypto model	null (reproduces the bug)
MCP v3UserProfile(tournament: 12)	2d844064-...
CryptoAPI().public_user_profile(...)['id']	2d844064-... (matches)
submission_scores(model_id)	70,083 rows of real data
Signals / Classic regression	resolve to expected ids

🤖 Generated with Claude Code

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Preserve Classic nmrStaked return type

For NumerAPI.public_user_profile callers, this new shared conversion changes nmrStaked from the raw GraphQL string returned by the previous Classic implementation into a Decimal. That is a public API/serialization change unrelated to adding Crypto support; for example existing Classic users doing json.dumps(api.public_user_profile(...)) or string-based persistence/comparisons can now fail or behave differently. Keep the conversion scoped to APIs that already returned Decimal, or make the Classic behavior an explicit compatibility break.

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[lingster]

Superseded by upstream PR numerai#128.