[BUG] Filtering doesn't work on sub-fields in PPL

[A-Gray-Cat]

What is the bug?
Filtering on sub-fields don’t work, as return results include log lines that don’t match the criteria. For example, I specified that I only want to see the logs where api.operation = 'GetBucketAcl', but got logs returned that don’t match that criteria.

How can one reproduce the bug?
Steps to reproduce the behavior:

1. Go to Data sources -> securitylake -> query data -> open log explorer
2. Run the follow queries:

source = securitylake.amazon_security_lake_glue_db_us_east_1.amazon_security_lake_table_us_east_1_cloud_trail_mgmt_2_0
| where time_dt > '2024-07-31 00:00:00' and region = 'us-east-1' and api.operation = 'GetBucketAcl'
| head 10

What is the expected behavior?
Only the logs that satisfy the filters are returned

What is your host/environment?

• OS: [e.g. iOS]
• Version 2.13
• Plugins

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Do you have any additional context?
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