fix connection

[jdchawla29]

Note

Medium Risk
Changes how connector copies are created and rewrites HUD-specific request headers, which could affect remote MCP session/environment routing if assumptions differ across servers. Scope is limited and covered by new unit tests for HUD vs non-HUD behavior.

Overview
Ensures Connector.copy() produces fully isolated state for parallel eval traces by deep-copying the transport and cloning ConnectionConfig list fields, rather than reusing shared mutable objects.

For HUD MCP servers only, copy() now normalizes Environment-Name casing and generates a fresh Environment-Id (UUID) per copied connector to prevent environment/session state leaking across concurrent contexts. Adds tests validating transport/config isolation and that HUD connectors get unique environment IDs while non-HUD connectors keep existing env/session headers.

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[chatgpt-codex-connector]

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