Remove default port to improve security and flexibility for self-hosted instances

[Ray0907]

Key changes:

• Removed default port assignment in host configuration
• Modified connection logic to only use a port if explicitly provided
• Updated relevant functions to handle connections without a specified port
• Added warning logs when attempting to connect without a port, if appropriate
• Included unit tests to verify behavior with and without port specification

[Copilot]

Pull Request Overview

This PR removes the default port assignment when using the host parameter to improve security and accommodate self-hosted instances. It updates the constructor logic to only use a port if explicitly provided, reforms the URL parsing behavior, and adjusts the REST endpoint construction accordingly.

Comments suppressed due to low confidence (1)

packages/js-client-rest/src/qdrant-client.ts:81

• Defaulting to port 6333 in the fallback branch contradicts the PR's aim of removing default port assignment. Consider setting _port to null instead of 6333 when no explicit port is provided.

this._port = port || 6333; // Use default port 6333 if not provided

[Copilot]

The validation for the host parameter no longer checks for a port in the host string. To avoid ambiguity, consider stripping or validating any port information embedded in the host if it should be handled exclusively via the port parameter.