The Dolt storage was scanning created_at and updated_at directly into
time.Time fields, but SQLite stores these as TEXT strings. The Go SQLite
driver cannot automatically convert TEXT to time.Time.
Added parseTimeString() helper and fixed all scan functions:
- issues.go: scanIssue()
- dependencies.go: scanIssueRow()
- history.go: GetIssueHistory(), GetIssueAsOf()
- transaction.go: scanIssueTx()
Fixes bd-4dqmy
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>