fix: remove media_type from usage_log SQL queries + gofmt + inline test helpers

backend/internal/repository/usage_log_repo.go

@@ -28,7 +28,7 @@ import (
 	gocache "github.com/patrickmn/go-cache"
 )
 
-const usageLogSelectColumns = "id, user_id, api_key_id, account_id, request_id, model, requested_model, upstream_model, group_id, subscription_id, input_tokens, output_tokens, cache_creation_tokens, cache_read_tokens, cache_creation_5m_tokens, cache_creation_1h_tokens, image_output_tokens, image_output_cost, input_cost, output_cost, cache_creation_cost, cache_read_cost, total_cost, actual_cost, rate_multiplier, account_rate_multiplier, billing_type, request_type, stream, openai_ws_mode, duration_ms, first_token_ms, user_agent, ip_address, image_count, image_size, media_type, service_tier, reasoning_effort, inbound_endpoint, upstream_endpoint, cache_ttl_overridden, channel_id, model_mapping_chain, billing_tier, billing_mode, created_at"
+const usageLogSelectColumns = "id, user_id, api_key_id, account_id, request_id, model, requested_model, upstream_model, group_id, subscription_id, input_tokens, output_tokens, cache_creation_tokens, cache_read_tokens, cache_creation_5m_tokens, cache_creation_1h_tokens, image_output_tokens, image_output_cost, input_cost, output_cost, cache_creation_cost, cache_read_cost, total_cost, actual_cost, rate_multiplier, account_rate_multiplier, billing_type, request_type, stream, openai_ws_mode, duration_ms, first_token_ms, user_agent, ip_address, image_count, image_size, service_tier, reasoning_effort, inbound_endpoint, upstream_endpoint, cache_ttl_overridden, channel_id, model_mapping_chain, billing_tier, billing_mode, created_at"
 
 // usageLogInsertArgTypes must stay in the same order as:
 //  1. prepareUsageLogInsert().args
@@ -73,7 +73,6 @@ var usageLogInsertArgTypes = [...]string{
 	"text",        // ip_address
 	"integer",     // image_count
 	"text",        // image_size
-	"text",        // media_type
 	"text",        // service_tier
 	"text",        // reasoning_effort
 	"text",        // inbound_endpoint
@@ -352,7 +351,6 @@ func (r *usageLogRepository) createSingle(ctx context.Context, sqlq sqlExecutor,
 			ip_address,
 			image_count,
 			image_size,
-			media_type,
 			service_tier,
 			reasoning_effort,
 			inbound_endpoint,
@@ -369,7 +367,7 @@ func (r *usageLogRepository) createSingle(ctx context.Context, sqlq sqlExecutor,
 			$10, $11, $12, $13,
 			$14, $15, $16, $17,
 			$18, $19, $20, $21, $22, $23,
-			$24, $25, $26, $27, $28, $29, $30, $31, $32, $33, $34, $35, $36, $37, $38, $39, $40, $41, $42, $43, $44, $45, $46
+			$24, $25, $26, $27, $28, $29, $30, $31, $32, $33, $34, $35, $36, $37, $38, $39, $40, $41, $42, $43, $44, $45
 		)
 		ON CONFLICT (request_id, api_key_id) DO NOTHING
 		RETURNING id, created_at
@@ -790,7 +788,6 @@ func buildUsageLogBatchInsertQuery(keys []string, preparedByKey map[string]usage
 			ip_address,
 			image_count,
 			image_size,
-			media_type,
 			service_tier,
 			reasoning_effort,
 			inbound_endpoint,
@@ -1003,7 +1000,6 @@ func buildUsageLogBestEffortInsertQuery(preparedList []usageLogInsertPrepared) (
 			ip_address,
 			image_count,
 			image_size,
-			media_type,
 			service_tier,
 			reasoning_effort,
 			inbound_endpoint,
@@ -1077,7 +1073,6 @@ func buildUsageLogBestEffortInsertQuery(preparedList []usageLogInsertPrepared) (
 			ip_address,
 			image_count,
 			image_size,
-			media_type,
 			service_tier,
 			reasoning_effort,
 			inbound_endpoint,
@@ -1125,7 +1120,6 @@ func buildUsageLogBestEffortInsertQuery(preparedList []usageLogInsertPrepared) (
 			ip_address,
 			image_count,
 			image_size,
-			media_type,
 			service_tier,
 			reasoning_effort,
 			inbound_endpoint,
@@ -1181,7 +1175,6 @@ func execUsageLogInsertNoResult(ctx context.Context, sqlq sqlExecutor, prepared
 			ip_address,
 			image_count,
 			image_size,
-			media_type,
 			service_tier,
 			reasoning_effort,
 			inbound_endpoint,