[log] Add debug logger to config/config_stdin.go

[github-actions]

Adds a logger.New("config:config_stdin") debug logger to internal/config/config_stdin.go with 5 targeted logging calls to improve troubleshooting of the stdin JSON configuration parsing path.

Changes

File modified: internal/config/config_stdin.go

New logger declaration

var logStdin = logger.New("config:config_stdin")

Logging calls added

Function	Log message
convertStdinConfig	"Converting stdin config: %d servers" — logs server count at entry
convertStdinConfig	"No gateway config in stdin, applying defaults" — logs when defaults are applied
convertStdinServerConfig	"Converting server %q: type=%s" — logs server name and resolved type
buildStdioServerConfig	"Server %q: using custom entrypoint %q" — logs non-default entrypoint
normalizeLocalType	"Normalized 'local' server type to 'stdio' for backward compatibility" — logs backward-compat normalization

Why these locations?

• convertStdinConfig: Entry point for conversion; knowing the server count helps diagnose config issues
• convertStdinServerConfig: Type resolution is a key decision point; logging name + type makes it easy to trace per-server parsing
• buildStdioServerConfig: Custom entrypoints affect container behaviour and are worth flagging in debug output
• normalizeLocalType: Silent backward-compat transformation that can be confusing; making it visible aids debugging

How to see the logs

DEBUG=config:* ./awmg --config config.toml
# or for stdin mode:
echo '{"mcpServers": {...}}' | DEBUG=config:* ./awmg

Checklist

• Exactly 1 file modified
• No test files modified
• Logger naming follows pkg:filename convention (config:config_stdin)
• No side effects in log arguments (all arguments are plain variables)
• Messages are meaningful and non-redundant with existing logConfig calls
• Import properly formatted

Generated by Go Logger Enhancement

[Copilot]

Pull request overview

Adds targeted debug logging to the stdin (JSON) configuration parsing/conversion path to improve troubleshooting without changing behavior.

Changes:

• Introduces a dedicated debug logger for internal/config/config_stdin.go (config:config_stdin).
• Adds 5 debug log statements at key decision points in stdin config conversion (server count, gateway defaults, per-server type, custom entrypoint, and local→stdio normalization).

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