Validate chart parameters for #96

[tazarov]

Summary

• add Helm template validation helpers for chromadb.allowReset, chromadb.isPersistent, and chromadb.persistDirectory
• accept booleans or case-insensitive string booleans for allowReset/isPersistent, normalize rendered values to lowercase
• enforce chromadb.persistDirectory as a non-empty absolute path
• wire normalized values through statefulset env/PVC/mount rendering and v1 config generation
• add regression tests for valid/invalid inputs and update docs/examples

Validation

• bash tests/ci_smoke.sh

Closes #96

[Copilot]

Pull request overview

Adds strong Helm chart input validation and normalization for key ChromaDB parameters to prevent misconfiguration at install/upgrade time (per #96), and wires the normalized values through rendered manifests and v1 server config generation.

Changes:

• Introduces Helm helper templates to validate/normalize chromadb.allowReset, chromadb.isPersistent, and chromadb.persistDirectory.
• Uses normalized values when rendering StatefulSet env vars, PVC creation, and volume mounts.
• Extends regression tests and updates README examples/docs to reflect accepted inputs and normalization behavior.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
tests/test_v1_config.sh	Adds test helpers and regression cases for valid/invalid boolean strings and persist directory path validation.
charts/chromadb-chart/templates/statefulset.yaml	Switches rendering to validated/normalized helper outputs; ensures PVC/mount logic works with string booleans.
charts/chromadb-chart/templates/_helpers.tpl	Adds boolean normalization + persist directory absolute-path validation helpers and uses them in v1 config generation.
README.md	Updates examples and value docs to reflect boolean/string-boolean acceptance and path requirements.

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