[Bug]: nodeFinder.typeOf() returns null as BLangNode for annotation fields

[mindula]

Description

Consider the following scenario where we're trying to get completions for annotation field,

annotation StringConstraints String on type, record field;
type ConstraintRecord record {|
    anydata value;
    string message;
|};

type StringConstraints record {|
    int|record{| *ConstraintRecord; int value; |} length?;
|};

@String {
    length : {<cursor>} 
}
type TestString string;

here, we get null as the bLangNode.

Steps to Reproduce

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Affected Version(s)

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OS, DB, other environment details and versions

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Related area

-> Compilation

Related issue(s) (optional)

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Suggested label(s) (optional)

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Suggested assignee(s) (optional)

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[mindula]

Related discussion #40668 (comment)

[github-actions]

This issue is NOT closed with a proper Reason/ label. Make sure to add proper reason label before closing. Please add or leave a comment with the proper reason label now.

      - Reason/EngineeringMistake - The issue occurred due to a mistake made in the past.
      - Reason/Regression - The issue has introduced a regression.
      - Reason/MultipleComponentInteraction - Issue occured due to interactions in multiple components.
      - Reason/Complex - Issue occurred due to complex scenario.
      - Reason/Invalid - Issue is invalid.
      - Reason/Other - None of the above cases.