Fix TLS blocking issue when buffer is doubled [dev]

[badrishc]

No description provided.

[Copilot]

Pull request overview

Fixes a TLS read-path edge case in NetworkHandler where doubling the transport receive buffer during an async TLS read could fail to trigger the follow-up read needed to drain remaining decrypted bytes, potentially leaving data stuck until more network bytes arrive.

Changes:

• Add an initialRetry flag to TLS async read helpers to carry “buffer just doubled; attempt another read” state across async continuations.
• Propagate the retry state when chaining from the Task<int>-based completion handler into the general async TLS reader loop.
• Update call sites after authentication and in the rare async branch of Read() to pass the new parameter.

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