Remove unused database models

[m-y-mo]

Actually these models aren't needed here at all

[Copilot]

Pull Request Overview

This PR removes unused database models from the memcache backend. The changes eliminate two SQLAlchemy model classes (AlertResults and AlertFlowGraph) that are not needed in the memcache server implementation.

• Removed AlertResults model class with alert tracking functionality
• Removed AlertFlowGraph model class with flow graph data functionality
• Cleaned up the file to only contain the necessary KeyValue model

Comments suppressed due to low confidence (2)

mcp_servers/memcache/memcache_backend/sql_models.py:1

• The relationship declaration is missing the back_populates parameter and should use the relationship function from SQLAlchemy, not a string call.

from sqlalchemy import String, Text, Integer, ForeignKey, Column

mcp_servers/memcache/memcache_backend/sql_models.py:1

• Mixed usage of Column and mapped_column patterns. Should use mapped_column for consistency with the rest of the model definitions.

from sqlalchemy import String, Text, Integer, ForeignKey, Column

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