fix(seeder): improve key idempotency and log names

Trim whitespace in provider model lists, format provider names as `group#keyID`
to match DP logs, and skip existing API keys during seeding (deleting on reset)
to keep runs idempotent and summaries accurate

cmd/seeder/generator.go

@@ -407,14 +407,20 @@ func (g *Generator) GenerateUsageSamples(ctx UsageSampleContext) []LogRequest {
 			// For historical data, we would need direct DB access.
 			// Current implementation creates logs at "now" time.
 
+			// Format provider_name as group#keyID to match DP log format
+			providerName := group.Name
+			if providerID > 0 {
+				providerName = fmt.Sprintf("%s#%d", group.Name, providerID)
+			}
+
 			result = append(result, LogRequest{
 				Group:        master.Group,
 				MasterID:     master.ID,
 				KeyID:        keyID,
-				Model:        modelName,     // Fixed: use Model not ModelName
-				ProviderID:   providerID,    // Fixed: use APIKey ID not group ID
+				Model:        modelName,
+				ProviderID:   providerID,
 				ProviderType: group.Type,
-				ProviderName: group.Name,
+				ProviderName: providerName,
 				StatusCode:   statusCode,
 				LatencyMs:    latencyMs,
 				TokensIn:     tokensIn,