feat: Add moss-connector-snowflake

[rohanshrma222]

Pull Request Checklist

Please ensure that your PR meets the following requirements:

• I have read the CONTRIBUTING guide.
• I have updated the documentation (if applicable).
• My code follows the style guidelines of this project.
• I have performed a self-review of my own code.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.

Description

Implements the Snowflake source connector for packages/moss-data-connector as described in issue.

This connector reads the result of any SQL SELECT query from a Snowflake warehouse and turns each row into a DocumentInfo document in a Moss search index. It uses the official snowflake-connector-python driver and works against any Snowflake account (Standard, Enterprise, or Snowflake on Azure/GCP).
Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context.

What's included

src/connector.py — SnowflakeConnector class with DictCursor so rows come back as dicts keyed by column name
src/ingest.py — ingest() async helper (copied from _template)
src/init.py — re-exports SnowflakeConnector and ingest
pyproject.toml — declares snowflake-connector-python>=3.0 dependency
tests/test_snowflake.py — unit tests with mocked snowflake.connector.connect and MossClient
tests/test_integration_snowflake_moss.py — live end-to-end test; auto-skips without credentials
README.md — usage guide and quickstart
.env.example — template with both password and RSA key-pair auth options
Row added to packages/moss-data-connector/README.md

Auth support

The connector supports both authentication methods:

Password — standard users (as specified in the issue)
RSA key-pair — SERVICE-type users or accounts with MFA enforced (optional private_key_path parameter)

Fixes #170

prvideo.mp4

Type of Change

Feature

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

[rohanshrma222]

@HarshaNalluru Can you approve this PR, i have attached a working demo video also.

[github-actions]

Codex review

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