Sanitize user inputs

[mariofrei]

Is your feature request related to a problem? Please describe.
User inputs (e.g., participant ID, experiment ID) should be sanitized in order to prevent malicious SQL injections.

Describe the solution you'd like
Ideally, all inputs that are transferred to the database are sanitized in the Lambda function, i.e., special characters are removed.

Describe alternatives you've considered
-

Additional context
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[mariofrei]

See:

• https://stackoverflow.com/questions/57208764/how-to-bind-parameters-to-influxdb-python-client-query
• https://stackoverflow.com/questions/2561178/python-equivalent-of-mysql-real-escape-string-for-getting-strings-safely-into-m

[mariofrei]

In addition, some special characters need to be excluded from measurement names, tag keys, and field keys:

• https://docs.influxdata.com/influxdb/cloud/reference/syntax/line-protocol/#special-characters

[mariofrei]

Input sanitization has been implemented on the backend.
However, there should also be some feedback in the app UI that shows a warning when valid characters are used.