fix: 修复 CPA 用量与请求终态关联

internal/repository/sqlite_usage.go

@@ -12,6 +12,7 @@ import (
 	"os"
 	"path/filepath"
 	"strings"
+	"sync"
 	"time"
 
 	"billing/internal/collection"
@@ -231,10 +232,10 @@ ON billing_ledger(managed_key_id, id DESC);
 `
 
 const (
-	// CLIProxyAPI UsageRecord currently has no RequestID. The usage and terminal
-	// callbacks nevertheless carry request-start timestamps from the same host
-	// execution, normally only a few milliseconds apart. This window is used
-	// only for the read projection and never changes persisted billing facts.
+	// Older CLIProxyAPI schemas have no RequestID in UsageRecord. Their usage and
+	// terminal callbacks nevertheless carry request-start timestamps from the
+	// same host execution, normally only a few milliseconds apart. This window
+	// is used only for the read projection and never changes persisted billing facts.
 	orphanLifecycleMatchWindow = 250 * time.Millisecond
 	// Near-equal candidates are deliberately left separate instead of risking a
 	// cross-request association under concurrent same-model traffic.
@@ -243,8 +244,9 @@ const (
 
 // SQLiteUsageRepository 使用单写连接保存事实，并用独立连接池承载只读查询。
 type SQLiteUsageRepository struct {
-	db     *sql.DB
-	readDB *sql.DB
+	db           *sql.DB
+	readDB       *sql.DB
+	projectionMu sync.Mutex
 }
 
 func OpenSQLiteUsage(databasePath string) (*SQLiteUsageRepository, error) {
@@ -356,6 +358,8 @@ func sqliteDSN(databasePath string) (string, error) {
 }
 
 func (r *SQLiteUsageRepository) Insert(ctx context.Context, record collection.Record) error {
+	r.projectionMu.Lock()
+	defer r.projectionMu.Unlock()
 	eventKey := usageBillingEventKey(record)
 	tx, err := r.db.BeginTx(ctx, nil)
 	if err != nil {
@@ -468,6 +472,8 @@ UPDATE billing_cycles SET spent_micros=spent_micros+? WHERE managed_key_id=? AND
 }
 
 func (r *SQLiteUsageRepository) UpsertRequest(ctx context.Context, record collection.RequestRecord) error {
+	r.projectionMu.Lock()
+	defer r.projectionMu.Unlock()
 	requestID := strings.TrimSpace(record.RequestID)
 	if requestID == "" {
 		return errors.New("request_id 不能为空")