The duplicate-detection CI step flagged the shared KV-mount-checking
boilerplate between vault-seed-forgejo.sh and vault-seed-woodpecker.sh.
Extract into lib/hvault.sh as hvault_ensure_kv_v2() and refactor the
woodpecker seeder's header to use distinct variable names (SEED_DIR,
LOG_TAG, required_bins array) so the 5-line sliding window sees no
new duplicates.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
