The tracker-mapping worker loaded a pattern in its claim transaction and
committed the resolution in a separate, later transaction. A full-row
Update would write back stale values and clobber any user edit made in
between. Add UpdateMapping, which writes only the worker-resolved
columns (common_tracker_pattern_id, third_party_id, and a description
filled only when still empty), leaving user-editable fields untouched.
Also add ORDER BY tracker_pattern_id to the sibling pattern lookup: the
query used LIMIT without an ORDER BY, so an over-limit match set
returned an arbitrary subset and could resolve the third party
differently across runs.
Signed-off-by: Émile Ré <emile@probo.com>
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