feat(import): deterministic timestamp resolution before model detection
Add resolve_created_deterministic before the LLM detect_created path at both importer call sites: the journal-host CLI and web save route. The resolver handles full-timestamp filenames, the Limitless UTC exporter with UTC-to-local conversion, and unambiguous media metadata; conflicting, ambiguous, or invalid inputs fall through to model detection.
Add --deterministic-only to the journal-host CLI, the thin sol import client forwarded on save, and /app/import/api/save via deterministic_only so callers can guarantee no LLM call. Add web audit keys timestamp_detection_method, timestamp_detection_model_called, and timestamp_detection_no_match_reason to the save response and written metadata.
Regenerate the additive import OpenAPI contract. Plaud's explicit-timestamp bypass is unchanged.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>