Escaping issue with tag values

This issue occurs in our case because a user has entered specific meta data fields as just \.
According to the Influx docs, \ does not need to be escaped, but may be.
In our case, however, the backslash is followed with a comma, because it is at the end of the tag value, followed by another tag value, leading to messed up interpretation of the whole record.

In my opinion, the safest way to handle this is to always escape backslashes.

Steps to reproduce:
List the minimal actions needed to reproduce the behavior.

1. Create as List<> with at least one tag containing just a backslash \
2. Write this list to InfluxDB using
   client.getWriteApiBlocking().writeMeasurements(WriteParameters.DEFAULT_WRITE_PRECISION, myList);

Expected behavior:
Data would be inserted correctly.

Actual behavior:
Influx returns:
HTTP status code: 400; Message: unable to parse 'metrics,account.companyName=\,account.contactCity=\ [...]

Specifications:

• Client Version: 6.7.0
• InfluxDB Version: 3.7
• JDK Version: 17
• Platform: Linux/Docker/openjdk:17-alpine

Bắt đầu từ client.getWriteApiBlocking().writeMeasurements(...) và tái hiện lỗi với một giá trị tag chỉ chứa một dấu gạch chéo ngược, theo sau là một tag khác. Theo dõi cách measurement đó được tuần tự hóa trước khi request được gửi, sau đó xác minh rằng record thu được được InfluxDB chấp nhận và bổ sung coverage cho trường hợp này.