Supply enrichment_attempts in tracker pattern seed

The migration dropped the DEFAULT on
common_tracker_patterns.enrichment_attempts, so the column is now
NOT NULL with no default and inserts must set it explicitly. The e2e
seedCommonTrackerPattern helper still did a raw insert without it,
which broke TestThirdParty_ImportFromCommon and
TestTrackerPattern_CommonTrackerPatternID with a 23502 violation. Pass
0 for the seeded rows.

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

pkg/cookiebanner/common_pattern_enrichment_metadata.go

@@ -97,6 +97,7 @@ func buildCommonPatternEnrichmentMetadata(
 	}
 
 	thirdPartyStatus := commonPatternFieldStatusNotFound
+
 	switch {
 	case alreadyLinked:
 		thirdPartyStatus = commonPatternFieldStatusExternal