Adds db::recover, a discovery + recovery layer for pipeline items that
got half-written before the Stage 1 fix landed (content in content
store + SQLite shadow, no live CRDT entry). For each orphan, the
content body is re-anchored to a fresh non-tombstoned id and the old
id's content row is cleared.
Exposed as the recover_half_written_items MCP tool. dry_run defaults
to true so the caller can review what would change before mutating.
YAML front-matter parsing is hand-rolled and scoped to the three
fields the create_*_file path emits (name, type, depends_on). It
tolerates missing or malformed lines by falling back to safe
defaults; the orphan is recovered with the best metadata we can pull
from the body and the rest is left to the operator to fix up.
The discovery step is read-only and idempotent. Recovery is also
idempotent in the sense that once an orphan is lifted, the next
discovery pass won't see it.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Timmy
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