[0x5t4l1n]

Description

Quote PostgreSQL and MongoDB usernames, passwords and database names in the six Helm ConfigMaps that supply database configuration. Kubernetes requires ConfigMap data values to be strings: a password such as "123456" currently renders as a number, "null" renders as null, whitespace can be lost, and multiline values can break template parsing. Quoting preserves the configured value in both database and application ConfigMaps.

Refs #324 and the earlier, closed/unmerged #349. This PR covers database configuration values specifically, rather than claiming to resolve every Helm deployment issue. It bumps the chart version to 0.1.6 and adds rendered-manifest regression tests plus a dedicated CI job.

Testing

On Windows with Python 3.10 and Helm 3.16.4:

• python -m pytest deploy/tests -q: 7 passed. The six custom-credential cases failed before the fix; the default configuration passed.
• Tests render the actual chart, parse every ConfigMap and check that all data values are strings. They also verify exact round-trip values for numeric/boolean/null-looking strings, empty strings, leading/trailing spaces and multiline punctuation.
• helm lint deploy/helm: passed; only the existing optional chart-icon recommendation appears.
• Black check for the test file and git diff --check: passed.

The branch was tested independently from the chatbot fix. No live Kubernetes deployment or database login was performed. The new CI job runs chart rendering tests and Helm lint without a cluster.

Documentation

Added test setup and execution instructions in deploy/tests/README.md.

Checklist:

• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• Any dependent changes have been merged (none required)
• I have documented any changes if required in the docs.