fix: support for WORKSPACE_PREFIX env var

[NachoCamposMarti]

No description provided.

[gemini-code-assist]

Code Review

This pull request refactors the TradingView-specific Grype OCI label transformation logic by moving it out of the core GrypeTranslator and into a modular client extension structure (client_extensions/tradingview). The core GrypeTranslator now exposes a generic label_value_transforms property, and the phoenix_multi_scanner_enhanced script dynamically applies the TradingView transforms if requested. Additionally, the required WORKSPACE_PREFIX environment variable configuration has been added to the Docker Compose and example environment files. Feedback was provided regarding the type check in apply_tv_tags_to_grype_translator, suggesting the use of isinstance instead of a string-based class name comparison to make the check more robust.

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