feat(hardware): collect and export licenses via Dell iDRAC10 Redfish walk

Implements the hardware.licenses[] contract section (v2.12, refreshed from
reanimator/core's hardware-ingest-contract.md — was v2.11 locally).

- models.License / HardwareConfig.Licenses mirror the contract field set.
- collector.collectLicenses() reads the standard DMTF
  /redfish/v1/LicenseService/Licenses collection during Redfish-walk replay;
  it's a generic DMTF resource, not Dell-specific, so any future vendor's
  Redfish walk gets license collection for free through
  ReplayRedfishFromRawPayloads.
- vendors/dell merges replayed Licenses like every other category.
- exporter.convertLicenses/dedupeLicenses wire hw.Licenses into the
  reanimator export directly (no canonical-devices merge — licenses have no
  physical identity to merge on), setting Present on every record from the
  start (per the ADL-049 round-trip lesson).
- chart viewer renders a licenses section in /chart/current.

Verified end-to-end on the PowerEdge R7715 (1TVFYL4) TSR: 3 system-level
licenses extracted and correctly exported/rendered.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

internal/exporter/reanimator_models.go

@@ -23,6 +23,7 @@ type ReanimatorHardware struct {
 	BMCEventSummary []ReanimatorBMCEventRow `json:"bmc_event_summary,omitempty"`
 	EventLogs       []ReanimatorEventLog    `json:"event_logs,omitempty"`
 	PlatformConfig  map[string]any          `json:"platform_config,omitempty"`
+	Licenses        []ReanimatorLicense     `json:"licenses,omitempty"`
 }
 
 // ReanimatorBMCEventRow is one row in the BMC critical/warning event summary table.
@@ -218,6 +219,26 @@ type ReanimatorPSU struct {
 	ErrorDescription     string                         `json:"error_description,omitempty"`
 }
 
+// ReanimatorLicense represents a software/firmware license or
+// feature-on-demand activation (BMC advanced license, vGPU, CPU FoD, etc).
+// ComponentRef is empty for system-level licenses.
+type ReanimatorLicense struct {
+	Name             string                         `json:"name"`
+	LicenseKey       string                         `json:"license_key,omitempty"`
+	Vendor           string                         `json:"vendor,omitempty"`
+	Type             string                         `json:"type,omitempty"`
+	Feature          string                         `json:"feature,omitempty"`
+	ComponentRef     string                         `json:"component_ref,omitempty"`
+	ActivatedAt      string                         `json:"activated_at,omitempty"`
+	ExpiresAt        string                         `json:"expires_at,omitempty"`
+	Present          *bool                          `json:"present,omitempty"`
+	Status           string                         `json:"status,omitempty"`
+	StatusCheckedAt  string                         `json:"status_checked_at,omitempty"`
+	StatusChangedAt  string                         `json:"status_changed_at,omitempty"`
+	StatusHistory    []ReanimatorStatusHistoryEntry `json:"status_history,omitempty"`
+	ErrorDescription string                         `json:"error_description,omitempty"`
+}
+
 type ReanimatorEventLog struct {
 	Source       string         `json:"source"`
 	EventTime    string         `json:"event_time,omitempty"`