feat(agama): add transpiler variable naming and access conformance tests

[imran-ishaq]

Prepare

• Read PR guidelines
• Read license information

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Description

Adds VariableAccessTest to the Agama transpiler module, pinning the transpiler to the language reference's variable
naming and data-access rules: valid names and access forms (dot, numeric index, .length, quoted and $-prefixed property
access) transpile, while an invalid name (leading underscore) and expression-based indexing (x[person.age], x[y[0]]) are
rejected. Registered in the module's TestNG suite. No production change — confirms current behavior conforms to the
spec.

Target issue

The Agama language reference defines the variable-name pattern a-zA-Z* and the rules for accessing
data (dot notation, zero-based indexing, .length, quoted/$-prefixed property access), and explicitly disallows
expression-based indexing (x[person.age], x[y[0]]). There is no test pinning the transpiler to these rules.

closes #14424

Implementation Details

• New test agama/transpiler/src/test/java/io/jans/agama/test/VariableAccessTest.java (positive valid names/access via
  Transpiler.transpile; negative invalid name +expression indexing via Transpiler.runSyntaxCheck).
• Registered the class in agama/transpiler/src/test/resources/testng.xml.
• Full transpiler suite passes (4 tests, 0 failures).

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Test and Document the changes

• Static code analysis has been run locally and issues have been fixed
• Relevant unit and integration tests have been added/updated
• Relevant documentation has been updated if any (i.e. user guides, installation and configuration guides, technical design docs etc)

Please check the below before submitting your PR. The PR will not be merged if there are no commits that start with docs: to indicate documentation changes or if the below checklist is not selected.

• I confirm that there is no impact on the docs due to the code changes in this PR.

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📥 Commits

Reviewing files that changed from the base of the PR and between da7f934 and 6168520.

📒 Files selected for processing (2)

• agama/transpiler/src/test/java/io/jans/agama/test/VariableAccessTest.java
• agama/transpiler/src/test/resources/testng.xml

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch agama-transpiler-variable-access-tests

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[mo-auto]

✅ Snyk checks have passed. No issues have been found so far.

Status	Scan Engine	Critical	High	Medium	Low	Total (0)
✅	Open Source Security	0	0	0	0	0 issues

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[sonarqubecloud]

Quality Gate passed for 'agama parent'

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud