Get default collection name from environment when using mem0_memory t…

[Moonlight-CL]

…ool and initiating it use default configuration

Description

Get the collection_name from the environment rather than use the 'mem0_memory' when use mem0-memory tool with the default configuration.

When use 'mem0_memory' as the collection name to create a collection in AWS Opensearch, it is not a valid collection name.

Related Issues

#250

Documentation PR

N/A, as there is no user-facing change on this PR.

Type of Change

Bug fix
New Tool
Breaking change
Documentation update
Other (please describe): Enhancement.

Testing

How have you tested the change? Verify that the changes do not break functionality or introduce warnings in consuming repositories: agents-docs, agents-tools, agents-cli

• I ran hatch run prepare

Checklist

• I have read the CONTRIBUTING document
• I have added any necessary tests that prove my fix is effective or my feature works
• I have updated the documentation accordingly
• I have added an appropriate example to the documentation to outline the feature
• My changes generate no new warnings
• Any dependent changes have been merged and published

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[Moonlight-CL]

It looks fine , read collection_name from the environment and get the default value if user doesn't set the environment