feat(viewer): add licenses hardware section

Renders hardware.licenses[] (Reanimator hardware ingest contract v2.12)
between power_supplies and sensors, same treatment as every other
component category: preferred section order, title, and column order.
Purely additive — consumers whose snapshots don't carry hardware.licenses
are unaffected, and any snapshot that does already renders it today via
the generic extraKeys fallback, just without a curated order/columns.

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

viewer/render.go

@@ -18,6 +18,7 @@ var sectionOrder = []string{
 	"storage",
 	"pcie_devices",
 	"power_supplies",
+	"licenses",
 	"sensors",
 	"event_logs",
 	"platform_config",
@@ -31,6 +32,7 @@ var sectionTitles = map[string]string{
 	"storage":         "Storage",
 	"pcie_devices":    "PCIe Devices",
 	"power_supplies":  "Power Supplies",
+	"licenses":        "Licenses",
 	"sensors":         "Sensors",
 	"event_logs":      "Event Logs",
 	"platform_config": "Platform Config",
@@ -80,6 +82,7 @@ var preferredColumns = map[string][]string{
 	"storage":        {"type", "model", "serial_number", "firmware", "size_gb", "logical_block_size_bytes", "physical_block_size_bytes", "metadata_bytes_per_block", "slot"},
 	"pcie_devices":   {"device_class", "manufacturer", "model", "serial_number", "mac_addresses", "slot", "numa_node", "link_speed", "link_width", "bdf"},
 	"power_supplies": {"vendor", "model", "part_number", "serial_number", "slot"},
+	"licenses":       {"name", "vendor", "type", "feature", "component_ref", "license_key", "expires_at"},
 	"event_logs":     {"severity_icon", "source", "event_time", "severity", "message_id", "message", "component_ref", "fingerprint", "is_active", "raw_payload"},
 	"fans":           {"name", "rpm"},
 	"power":          {"name", "voltage_v", "current_a", "power_w"},