Add optional Adanos sentiment features

[alexander-schneider]

Summary

• add an opt-in AdanosSentimentProcessor for daily US equity sentiment from Reddit, X, news, and Polymarket
• normalize source responses into one row per ticker and UTC date with source-prefixed features
• cache only completed UTC windows and provide a validated left join for FinRL price datasets
• document setup, plan-aware date windows, missing-data semantics, and look-ahead precautions

Design

The integration stays in the data layer and performs no API calls inside strategy, environment, backtest, or execution steps. It uses the existing requests dependency and ADANOS_API_KEY; no additional package is required. Requests use the current inclusive from / to API contract rather than the deprecated days parameter.

Successful historical responses are cached by a request fingerprint that excludes the API key. Windows including the current UTC date are deliberately re-fetched because their daily aggregates are incomplete and still changing.

Verification

• python -m pytest -q (8 passed)
• python -m black --check src/data/adanos_sentiment.py tests/data/test_adanos_sentiment.py
• python -m compileall -q src/data/adanos_sentiment.py tests/data/test_adanos_sentiment.py
• python -m pip check
• current https://api.adanos.org/openapi.json checked for all four endpoint, date parameter, response schema, and activity-field contracts
• structured autoreview: clean, no accepted/actionable findings

Adanos API documentation: https://api.adanos.org/docs