Add SOXL signal consumer contract

[Pigbibi]

Summary

• add the us_equity:soxl_soxx_trend_income derived-indicator consumer contract
• export a SOXL/SOXX runtime market-signal consumer constant
• update signal bundle, handoff, and research CLI fixtures for the new runtime consumer coverage

Tests

• timeout 60 python -m compileall -q src tests
• timeout 300 uv run --with pytest python -m pytest tests/test_signal_bundle_contract.py tests/test_signal_bundle_cli.py tests/test_smart_dca_research_cli.py tests/test_runtime_market_signal_inputs.py -q

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: ce9ba17701

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[chatgpt-codex-connector]

Normalize SOXL symbols before fallback validation

When a SOXL/SOXX signal bundle uses the documented lowercase soxl/soxx symbols, the normal consumer validation accepts it because symbols are normalized and _canonical_market_data preserves the original keys. If fallback_mode=last_valid later loads that cached payload, _validate_market_signal_inputs_for_consumer does an exact derived_indicators.get(symbol) using this new uppercase SOXL contract key, so the fallback rejects a cache entry that the primary extraction path accepted; normalize the fallback lookup or align the contract casing with the canonical input shape.

Useful? React with 👍 / 👎.