Sync schema fields with disk state

Add missing optional fields to Zod schemas to match real on-disk data

Iterative tightening of schemas to match real data without losing type strictness

• · vitest failures from disk-validation tests
• · actual JSONL/JSON/settings files
• · current Zod schema definitions

• · updated schema files with .optional() fields
• · passing disk-validation tests

• · npm/vitest
• · jq for parsing disk data

• · vitest test suite exists
• · unrecognized_keys or type mismatch failures

• · field type inferred wrong from disk values
• · field genuinely requires z.unknown() (weakness)

• · reads actual on-disk values before choosing type
• · dry-run via vitest first
• · maintains .strict() on objects
• · groups failures by schema+key for dedup