Add Verisoo attest/verify web MVP — full attestation lifecycle
Attest page (/attest):
- Image upload with optional caption and location
- EXIF auto-extraction toggle
- Creates Ed25519-signed attestation record
- Stores in verisoo append-only binary log + LMDB index
- Displays: record ID, attestor fingerprint, timestamp, image hashes
Verify page (/verify):
- Image upload for verification against local attestation log
- SHA-256 exact matching + perceptual hash matching (pHash, dHash)
- Shows match type (exact/perceptual), hash distances, attestor info
- Color-coded distance badges (green=0, info<5, warning<10, danger>=10)
Attestation log (/attest/log):
- Lists recent attestations with short ID, attestor, timestamp, SHA-256
- Shows total record count
Verified: full lifecycle works — attest image → verify same image → exact match found
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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