feat(hub,site): enhance domain intelligence and monitor performance

Implement comprehensive domain data collection including provider detection (DNS, hosting, email, CA), HTTP headers, TLS certificate chains, and SEO metadata. Added PageSpeed Insights integration for monitors to track Core Web Vitals.

- **hub**:
  - Add provider detection logic for DNS, email, and hosting.
  - Expand `Domain` entity to include SEO, headers, certificates, and enhanced registration details.
  - Implement automated collection of TLD, WHOIS raw data, and host country codes.
  - Update scheduler to track changes in providers and security settings (privacy/transfer lock).
  - Add PageSpeed check endpoint to monitor API.
- **site**:
  - Update domain table and detail views to display new intelligence (providers, headers, SEO).
  - Implement PageSpeed metrics visualization with Core Web Vitals status indicators.
  - Add display options for provider information in the domain list.
- **db**:
  - Add migration for new domain collection fields.

internal/entities/domain/domain.go

@@ -71,6 +71,33 @@ type Domain struct {
 	AbuseEmail string `json:"abuse_email" db:"abuse_email"`
 	AbusePhone string `json:"abuse_phone" db:"abuse_phone"`
 
+	// Provider Detection
+	DNSProvider     string `json:"dns_provider" db:"dns_provider"`
+	HostingProvider string `json:"hosting_provider" db:"hosting_provider"`
+	EmailProvider   string `json:"email_provider" db:"email_provider"`
+	CAProvider      string `json:"ca_provider" db:"ca_provider"`
+
+	// HTTP Headers
+	Headers []Header `json:"headers" db:"headers"`
+
+	// Certificate Chain
+	Certificates []Certificate `json:"certificates" db:"certificates"`
+
+	// SEO Metadata
+	SEOMeta *SEOMeta `json:"seo_meta" db:"seo_meta"`
+
+	// Raw WHOIS Response
+	WHOISRaw string `json:"whois_raw" db:"whois_raw"`
+
+	// Registration Details
+	PrivacyEnabled bool     `json:"privacy_enabled" db:"privacy_enabled"`
+	TransferLock   bool     `json:"transfer_lock" db:"transfer_lock"`
+	TLD            string   `json:"tld" db:"tld"`
+	DomainStatuses []string `json:"domain_statuses" db:"domain_statuses"`
+
+	// Enhanced Geo
+	HostCountryCode string `json:"host_country_code" db:"host_country_code"`
+
 	// Metadata
 	Tags       []string `json:"tags" db:"tags"`
 	Notes      string   `json:"notes" db:"notes"`
@@ -176,6 +203,76 @@ type IPInfo struct {
 	IPv6 []string `json:"ipv6"`
 }
 
+// Header represents an HTTP response header
+type Header struct {
+	Name  string `json:"name"`
+	Value string `json:"value"`
+}
+
+// Certificate represents a TLS certificate in the chain
+type Certificate struct {
+	Issuer     string    `json:"issuer"`
+	Subject    string    `json:"subject"`
+	AltNames   []string  `json:"alt_names"`
+	ValidFrom  time.Time `json:"valid_from"`
+	ValidTo    time.Time `json:"valid_to"`
+	CAProvider string    `json:"ca_provider"`
+}
+
+// OpenGraphMeta represents Open Graph metadata
+type OpenGraphMeta struct {
+	URL         string   `json:"url"`
+	Type        string   `json:"type"`
+	Title       string   `json:"title"`
+	Images      []string `json:"images"`
+	Description string   `json:"description"`
+}
+
+// TwitterMeta represents Twitter card metadata
+type TwitterMeta struct {
+	Title       string `json:"title"`
+	Description string `json:"description"`
+	Image       string `json:"image"`
+	Card        string `json:"card"`
+}
+
+// GeneralMeta represents general HTML meta tags
+type GeneralMeta struct {
+	Title       string `json:"title"`
+	Author      string `json:"author"`
+	Robots      string `json:"robots"`
+	Keywords    string `json:"keywords"`
+	Canonical   string `json:"canonical"`
+	Description string `json:"description"`
+}
+
+// RobotsTxt represents parsed robots.txt data
+type RobotsTxt struct {
+	Fetched  bool          `json:"fetched"`
+	Groups   []RobotsGroup `json:"groups"`
+	Sitemaps []string      `json:"sitemaps"`
+}
+
+// RobotsGroup represents a user-agent group in robots.txt
+type RobotsGroup struct {
+	UserAgents []string     `json:"userAgents"`
+	Rules      []RobotsRule `json:"rules"`
+}
+
+// RobotsRule represents a single rule in robots.txt
+type RobotsRule struct {
+	Type  string `json:"type"`
+	Value string `json:"value"`
+}
+
+// SEOMeta represents all SEO-related metadata
+type SEOMeta struct {
+	OpenGraph OpenGraphMeta `json:"openGraph"`
+	Twitter   TwitterMeta   `json:"twitter"`
+	General   GeneralMeta   `json:"general"`
+	Robots    RobotsTxt     `json:"robots"`
+}
+
 // ChangeType constants for domain history
 const (
 	ChangeTypeExpiry    = "expiry"
@@ -185,6 +282,9 @@ const (
 	ChangeTypeIP        = "ip"
 	ChangeTypeHost      = "host"
 	ChangeTypeStatus    = "status"
+	ChangeTypeProvider  = "provider"
+	ChangeTypeSecurity  = "security"
+	ChangeTypeSEO       = "seo"
 )
 
 // Domain status constants