Add http proxy support for ai agent

[www222fff]

sometimes due to network limitation we can not setup connection with AI server or client(twitter/discord) server directly, so request support proxy handling in .env

⛔ ERRORS
Full error details:
{"message":"request to https://api.openai.com/v1/embeddings failed, reason: ","type":"system","errno":"ETIMEDOUT","code":"ETIMEDOUT"}

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