Fix incorrect default values in docs and example config for startup/tool timeouts and domain

[Copilot]

Three documentation discrepancies between config_core.go constants and user-facing docs: startupTimeout/toolTimeout defaults were documented as 2× their actual values, and domain was documented as defaulting to "localhost" when it has no code-level default.

Changes

• docs/CONFIGURATION.md — Gateway config table: startupTimeout 60→30, toolTimeout 120→60, domain default localhost→(unset)
• config.example.toml — Inline comments corrected: (default: 60)→(default: 30) and (default: 120)→(default: 60); explicit override values (60/120) intentionally kept as examples of non-default configuration

Authoritative source

// internal/config/config_core.go
DefaultStartupTimeout = 30   // seconds (per spec §4.1.3)
DefaultToolTimeout    = 60   // seconds (per spec §4.1.3)

[Copilot]

Pull request overview

Updates user-facing documentation and the example TOML config to match the authoritative gateway defaults in internal/config/config_core.go (startup/tool timeouts) and to reflect that domain has no code-level default.

Changes:

• Correct startupTimeout default from 60 → 30 seconds in docs and example comments.
• Correct toolTimeout default from 120 → 60 seconds in docs and example comments.
• Update domain default in docs from localhost → (unset) to match code behavior.

Show a summary per file

File	Description
docs/CONFIGURATION.md	Fixes the gateway config table defaults for domain, startupTimeout, and toolTimeout to match code.
config.example.toml	Fixes inline comment defaults for startup/tool timeouts while keeping non-default example values.

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• Files reviewed: 2/2 changed files
• Comments generated: 0