Always create a common tracker pattern during mapping

When neither pattern nor domain matching finds an existing common
tracker pattern, upsert one with no third party association and a
lower confidence (0.5) so every seen pattern is cataloged.

Also fix table name in LoadByOrganizationIDAndCommonThirdPartyID
(vendors -> third_parties).

Signed-off-by: Émile Ré <emile@probo.com>

pkg/cookiebanner/tracker_mapping_worker.go

@@ -85,6 +85,10 @@ func (h *trackerMappingHandler) Process(ctx context.Context, tp coredata.Tracker
 				commonPatternID, thirdPartyID = h.matchByDomain(ctx, tx, tp)
 			}
 
+			if commonPatternID == nil {
+				commonPatternID = h.createUnmatchedPattern(ctx, tx, tp)
+			}
+
 			if commonPatternID != nil || thirdPartyID != nil {
 				if err := tp.UpdateMapping(ctx, tx, commonPatternID, thirdPartyID); err != nil {
 					return fmt.Errorf("cannot update tracker pattern mapping: %w", err)
@@ -179,6 +183,37 @@ func (h *trackerMappingHandler) matchByDomain(
 	return &commonPattern.ID, thirdPartyID
 }
 
+func (h *trackerMappingHandler) createUnmatchedPattern(
+	ctx context.Context,
+	tx pg.Tx,
+	tp coredata.TrackerPattern,
+) *gid.GID {
+	now := time.Now()
+	commonPattern := coredata.CommonTrackerPattern{
+		ID:            gid.New(gid.NilTenant, coredata.CommonTrackerPatternEntityType),
+		TrackerType:   tp.TrackerType,
+		Pattern:       tp.Pattern,
+		MatchType:     tp.MatchType,
+		Description:   tp.Description,
+		MaxAgeSeconds: tp.MaxAgeSeconds,
+		Confidence:    0.5,
+		CreatedAt:     now,
+		UpdatedAt:     now,
+	}
+
+	actualID, _, err := commonPattern.Upsert(ctx, tx)
+	if err != nil {
+		h.logger.ErrorCtx(
+			ctx,
+			"cannot upsert common tracker pattern for unmatched pattern",
+			log.Error(err),
+		)
+		return nil
+	}
+
+	return &actualID
+}
+
 func (h *trackerMappingHandler) resolveThirdParty(
 	ctx context.Context,
 	conn pg.Querier,

pkg/coredata/third_party.go

@@ -1352,7 +1352,7 @@ SELECT
 	created_at,
 	updated_at
 FROM
-	vendors
+	third_parties
 WHERE
 	%s
 	AND organization_id = @organization_id