feat: v0.4 dev

[killme2008]

Main changes:

• HTTP Transports, close Feature request: Support always-on / HTTP-based MCP server mode for long-running usage #23
• Fixed TQL start and end formats

[killme2008]

@copilot review this PR, please

[Copilot]

@killme2008 I've opened a new pull request, #25, to work on those changes. Once the pull request is ready, I'll request review from you.

[Copilot]

Pull request overview

This PR introduces HTTP transport support for the MCP server (addressing issue #23) and fixes TQL time parameter formatting to support SQL expressions alongside literal timestamps. The changes enable containerized and Kubernetes deployments through streamable-http and SSE transport modes, while maintaining backward compatibility with stdio mode for local CLI integration.

Key Changes:

• Added HTTP transport modes (streamable-http, sse) with configurable host/port settings
• Fixed TQL time parameter handling to support SQL expressions like now() - interval '5' minute
• Updated documentation and templates to clarify time format options

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
src/greptimedb_mcp_server/config.py	Added transport, listen_host, and listen_port configuration parameters with environment variable and CLI argument support
src/greptimedb_mcp_server/server.py	Implemented get_config() with fallback, updated main() to configure HTTP server settings based on transport mode, and integrated new time expression validation
src/greptimedb_mcp_server/utils.py	Added is_sql_time_expression(), format_tql_time_param(), and validate_time_expression() functions for handling SQL time expressions vs literal timestamps
tests/test_config.py	Added comprehensive tests for new transport-related configuration options
tests/test_http_transport.py	Added blackbox tests for streamable-http and SSE transport modes, including endpoint validation and configuration testing
tests/test_server.py	Updated setup_state fixture to include new transport configuration parameters
tests/test_utils.py	Added tests for time expression detection, formatting, and validation functions
README.md	Added HTTP Server Mode section with usage examples and transport mode descriptions
src/greptimedb_mcp_server/templates/promql_analysis/template.md	Added clarification about supported time formats for TQL queries
src/greptimedb_mcp_server/templates/promql_analysis/config.yaml	Updated argument descriptions to document time format options

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