Fix minor bugs

[niveathika]

Purpose

Fixes:

Examples

Checklist

• Linked to an issue
• Updated the specification
• Updated the changelog
• Added tests
• Checked native-image compatibility

[codecov]

Codecov Report

Attention: Patch coverage is 76.19048% with 5 lines in your changes missing coverage. Please review.

Project coverage is 76.68%. Comparing base (7aeb5af) to head (05e44b3).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
...n/java/io/ballerina/lib/cdc/BalChangeConsumer.java	81.25%	1 Missing and 2 partials ⚠️
...main/java/io/ballerina/lib/cdc/models/Payload.java	60.00%	1 Missing and 1 partial ⚠️

❌ Your project status has failed because the head coverage (76.68%) is below the target coverage (80.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff              @@
##               main      #18      +/-   ##
============================================
- Coverage     77.21%   76.68%   -0.53%     
- Complexity      212      214       +2     
============================================
  Files            29       29              
  Lines           882      892      +10     
  Branches        125      129       +4     
============================================
+ Hits            681      684       +3     
- Misses          132      136       +4     
- Partials         69       72       +3     

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