`loadConfig` in configuration.cts was superseded by config-loader.cts
(ADR-857 phase 2e, #885). Exhaustive grep confirms no caller imports
loadConfig from configuration.cjs — all live callers use config-loader.cjs
or the core.cjs back-compat re-export. configuration.cts now provides only
the pure normalization and defaults primitives (normalizeLegacyKeys,
mergeDefaults, migrateOnDisk, CONFIG_DEFAULTS) that config-loader.cts
depends on. Updated CONTEXT.md and docs/INVENTORY.md to reflect the
narrowed module surface.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>