Alan Kahn 1d826c87b2 feat: schema-level ranking profile definitions ... Add support for defining ranking profiles in schema YAML, allowing deployments to override builtin profiles with deployment-specific signal names and tuning parameters. - Add override_register() to ProfileRegistry for clean builtin replacement - Add with_profiles() to TidalDbBuilder to thread schema profiles - Parse profiles section in config.rs with full sort/strategy/agg support - Validate that profile signal references exist in schema at startup - Change load_schema() to return (Schema, Vec<RankingProfile>) This closes the gap where the builtin for_you profile referenced signals (view, like, share) that don't exist in deployment schemas, causing all feed scores to normalize to 1.0. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>		2026-03-04 12:12:54 -05:00
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middleware.rs	feat: schema-level ranking profile definitions	2026-03-04 12:12:54 -05:00