[Go SDK] Add documentation to Config struct fields

[santoshkumarradha]

Summary

The Go SDK Config struct has 10+ fields but lacks field-level documentation explaining what each field does and its expected values.

Current State

• File: sdk/go/agent/config.go (or similar location)
• Issue: Config struct fields have minimal or no documentation

Tasks

Add godoc comments to each field explaining:

1. What the field configures
2. Default value (if any)
3. Required vs optional
4. Valid value ranges or formats

Example Format

// Config defines the agent configuration options.
type Config struct {
    // NodeID is the unique identifier for this agent. Required.
    // Must be alphanumeric with hyphens, e.g., "my-agent-1".
    NodeID string

    // AgentFieldURL is the URL of the AgentField control plane server.
    // Default: "http://localhost:8080"
    AgentFieldURL string

    // Port is the local port the agent HTTP server listens on.
    // Default: 0 (automatically assigned)
    // Valid range: 1-65535
    Port int

    // TeamID groups related agents together for organization.
    // Optional. If empty, agent is ungrouped.
    TeamID string

    // ListenAddress is the network address to bind the agent server.
    // Default: "0.0.0.0" (all interfaces)
    ListenAddress string

    // ... more fields
}

Acceptance Criteria

• Every field in Config struct has a godoc comment
• Comments explain purpose, defaults, and constraints
• go doc output is clear and helpful
• Code compiles without errors

Files

• sdk/go/agent/ - Config-related files

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