chore: add API key ID to interceptions (#20513)

Adds APIKeyID to interceptions.
Needed for tracking API key usage with bridge.
fixes https://github.com/coder/coder/issues/20001

coderd/database/models.go

@@ -3614,6 +3614,7 @@ type AIBridgeInterception struct {
 	StartedAt   time.Time             `db:"started_at" json:"started_at"`
 	Metadata    pqtype.NullRawMessage `db:"metadata" json:"metadata"`
 	EndedAt     sql.NullTime          `db:"ended_at" json:"ended_at"`
+	APIKeyID    sql.NullString        `db:"api_key_id" json:"api_key_id"`
 }
 
 // Audit log of tokens used by intercepted requests in AI Bridge