2.4.x field type json format bug

[CharlesTHN]

修复问题：
运行过程中频发事件解析的空指针错误

parseEvent err:parseEvent err recover err:runtime error: invalid memory address or nil pointer dereference ;lastMapEvent:*mysql.TableMapEvent ;binlogFileName:mysql-bin.004480 ;binlogPosition:497749251
2025/10/20 11:14:03 goroutine 2909 [running]:
runtime/debug.Stack()
/Users/xiezuofu/go/pkg/mod/golang.org/toolchain@v0.0.1-go1.23.8.darwin-arm64/src/runtime/debug/stack.go:26 +0x5e
github.com/brokercap/Bifrost/Bristol/mysql.(*mysqlConn).DumpBinlog0.func1.1()
/Users/xiezuofu/go/src/github.com/brokercap/Bifrost/Bristol/mysql/conn_dump.go:132 +0x149
panic({0x10f7a00?, 0x1c7adc0?})
/Users/xiezuofu/go/pkg/mod/golang.org/toolchain@v0.0.1-go1.23.8.darwin-arm64/src/runtime/panic.go:791 +0x132
encoding/binary.Read({0x141c160, 0xc00064f230}, {0x14283b0, 0x1cc5e20}, {0x0, 0x0})
/Users/xiezuofu/go/pkg/mod/golang.org/toolchain@v0.0.1-go1.23.8.darwin-arm64/src/encoding/binary/binary.go:264 +0x23f
github.com/brokercap/Bifrost/Bristol/mysql.read_offset_or_inline(0x141c160?, 0x30?)
/Users/xiezuofu/go/src/github.com/brokercap/Bifrost/Bristol/mysql/field_type_json_format.go:273 +0x149
github.com/brokercap/Bifrost/Bristol/mysql.read_binary_json_object(0xc00064f230, 0x1454a, 0x1)
/Users/xiezuofu/go/src/github.com/brokercap/Bifrost/Bristol/mysql/field_type_json_format.go:222 +0x395
github.com/brokercap/Bifrost/Bristol/mysql.get_field_json_data0(0x10?, 0xa0?, 0xc00084d560?)
/Users/xiezuofu/go/src/github.com/brokercap/Bifrost/Bristol/mysql/field_type_json_format.go:49 +0x46
github.com/brokercap/Bifrost/Bristol/mysql.get_field_json_data({0xc002cc60b1, 0x1454b, 0x289c1}, 0x1454b)
/Users/xiezuofu/go/src/github.com/brokercap/Bifrost/Bristol/mysql/field_type_json_format.go:39 +0xa5
github.com/brokercap/Bifrost/Bristol/mysql.(*eventParser).parseEventRow(0x10e85e0?, 0xc00064f1d0, 0xc0015d2210, {0xc004ea8780, 0xd, 0xc0015d4c60?})
/Users/xiezuofu/go/src/github.com/brokercap/Bifrost/Bristol/mysql/event_row.go:588 +0x3205
github.com/brokercap/Bifrost/Bristol/mysql.(*eventParser).parseRowsEvent(0xc00089e120, 0xc00064f1d0)
/Users/xiezuofu/go/src/github.com/brokercap/Bifrost/Bristol/mysql/event_row.go:62 +0x352
github.com/brokercap/Bifrost/Bristol/mysql.(*eventParser).parseEvent(0xc00089e120, {0xc002cc6001, 0x28a71, 0x28a71})
/Users/xiezuofu/go/src/github.com/brokercap/Bifrost/Bristol/mysql/parser.go:256 +0xa39
github.com/brokercap/Bifrost/Bristol/mysql.(*mysqlConn).DumpBinlog0.func1(0xc0004c1e20, 0xc0015d22c0?, 0xc0004c1e18, {0xc002cc6000?, 0x1?, 0x28?})
/Users/xiezuofu/go/src/github.com/brokercap/Bifrost/Bristol/mysql/conn_dump.go:135 +0x85
github.com/brokercap/Bifrost/Bristol/mysql.(*mysqlConn).DumpBinlog0(0xc00223ae70, 0xc00089e120, 0xc000138390)
/Users/xiezuofu/go/src/github.com/brokercap/Bifrost/Bristol/mysql/conn_dump.go:136 +0x205
github.com/brokercap/Bifrost/Bristol/mysql.(*mysqlConn).DumpBinlogMySQLGtid(0xc00223ae70, 0xc00089e120, 0xc000138390)
/Users/xiezuofu/go/src/github.com/brokercap/Bifrost/Bristol/mysql/conn_dump.go:66 +0x165
github.com/brokercap/Bifrost/Bristol/mysql.(*mysqlConn).DumpBinlogGtid(0xc00223ae70, 0xc00089e120, 0xc000138390)
/Users/xiezuofu/go/src/github.com/brokercap/Bifrost/Bristol/mysql/conn_dump.go:52 +0x105
github.com/brokercap/Bifrost/Bristol/mysql.(*BinlogDump).startConnAndDumpBinlog.func2()
/Users/xiezuofu/go/src/github.com/brokercap/Bifrost/Bristol/mysql/binlog.go:267 +0x58
created by github.com/brokercap/Bifrost/Bristol/mysql.(*BinlogDump).startConnAndDumpBinlog in goroutine 73
/Users/xiezuofu/go/src/github.com/brokercap/Bifrost/Bristol/mysql/binlog.go:261 +0x43f

修复项：
1.修复了数组类型判断错误（之前数组分支错误地检查了 JSONB_TYPE_LARGE_OBJECT，已改为检查 JSONB_TYPE_LARGE_ARRAY）。
2.修复了在 large object 分支中 key offsets 的索引错误（把原来错误的 key_offset_lengths[0] = ... 改为 key_offset_lengths[i] = ...）。
3.修改了打包语句，Go 1.13+ 的 -trimpath 参数不需要指定路径值，它会自动移除所有本地路径信息。

单元测试已过，运行 一周没有再复现此异常