Fix str payload

[paco-valdez]

Query_rewrite can now receive string payloads; we should accept and ignore them. Str payloads are Postgres protocol metadata queries.

[Copilot]

Pull Request Overview

This PR adds support for string payloads in the query parser functions to handle Postgres protocol metadata queries. Previously, the parser functions expected dictionary/object payloads and would fail when receiving strings. The changes ensure that string payloads are gracefully converted to empty objects, allowing the functions to return empty results instead of raising errors.

• Added _ensure_dict_payload helper in Python and ensureObjectPayload helper in JavaScript to validate and normalize payloads
• Updated all public parser functions to accept Union[Dict[str, Any], str] (Python) or handle string payloads (JavaScript)
• Added comprehensive test coverage for string payload handling across all parser functions

Reviewed Changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
cube_utils/query_parser.py	Added payload validation helper and updated function signatures to accept string payloads
cube-utils-js/src/query-parser.js	Added JavaScript equivalent payload validation helper and updated all parser functions
tests/test_query_parser.py	Added test cases for string payload handling in all parser functions
cube-utils-js/test/query-parser.test.js	Added JavaScript test cases for string payload handling
pyproject.toml	Bumped version to 0.1.9
cube-utils-js/package.json	Bumped version to 0.1.9
feature_plans/validate_payloads.md	Added feature plan documentation for Python implementation
feature_plans/validate_payloads_js.md	Added feature plan documentation for JavaScript implementation
CLAUDE.md	Updated documentation with reference to AGENTS.md
AGENTS.md	Added project guidelines for maintaining consistency across implementations

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[Copilot]

Pull Request Overview

Copilot reviewed 10 out of 10 changed files in this pull request and generated no new comments.

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