feat(inventory): deep hardware capture + per-probe substeps + verbose logs

Extend Inventory stage from a one-liner summary to a per-probe substep
emitter with ~20-30 narrative log lines per run.

- spec: per-DIMM memory (slot/size/speed/manufacturer/part_number),
  richer CPU (vendor/stepping/physical_cores/flags), disk
  model/transport/rotational, NIC driver/pci_addr, GPU vram/pci/driver,
  new System/Baseboard/PSU/OS top-level sections. All fields omitempty
  so existing expected-spec YAML and artifacts stay compatible.
- spec.Diff: new diffDIMMs/diffSystem/diffBaseboard/diffPSU/diffOS
  helpers; extended diffDisks/diffNICs/diffGPUs for new fields. GPU
  diff gains PCIAddr-pinned matching alongside count-by-model.
- agent/probes/inventory: CPU (/proc/cpuinfo extended), Memory
  (dmidecode -t 17 multi-block), Disks (+model/transport/rotational),
  NICs (+driver/pci from sysfs), GPUs (VRAM from lspci -vv),
  new System/Baseboard (dmidecode -t system/baseboard), PSU
  (dmidecode -t 39), OS (/proc/sys/kernel/osrelease + /etc/os-release).
  All probes accept a Logger and emit per-finding info/warn lines.
- agent/probes/firmware: parseDmidecodeAllSections for multi-block
  fixtures (memory / PSU).
- agent/runner: Inventory case becomes 9 substep rows (CPU / Memory /
  Disks / NICs / GPUs / System / Baseboard / PSU / OS) with per-probe
  start/complete timestamps.
- report: new Inventory HTML section between Stages and Firmware;
  resolveReporting loads the inventory.json artifact.
- agent/tests/fakes/dmidecode: dispatches on -t flag to serve bios /
  memory / system / baseboard / 39 fixtures for unit tests.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

agent/tests/fakes/dmidecode/main.go

@@ -1,12 +1,41 @@
-// fake_dmidecode simulates `dmidecode -t bios` for unit tests of the
-// firmware probe's BIOS parser. Prints deterministic output modeled on
-// a real Supermicro host; exits 0 regardless of flags.
+// fake_dmidecode simulates the subset of `dmidecode -t <type>` output
+// the Vetting probes actually parse. Dispatches on the argument after
+// `-t` so the same binary serves both firmware (BIOS) and inventory
+// (memory / system / baseboard / power-supply) probes under test. Exits
+// 0 for every supported type; prints nothing for unknown types.
 package main
 
-import "fmt"
+import (
+	"fmt"
+	"os"
+)
 
 func main() {
-	fmt.Println(`# dmidecode 3.3
+	t := ""
+	for i, a := range os.Args {
+		if a == "-t" && i+1 < len(os.Args) {
+			t = os.Args[i+1]
+			break
+		}
+	}
+	switch t {
+	case "bios":
+		fmt.Println(biosFixture)
+	case "memory", "17":
+		fmt.Println(memoryFixture)
+	case "system":
+		fmt.Println(systemFixture)
+	case "baseboard":
+		fmt.Println(baseboardFixture)
+	case "39":
+		fmt.Println(psuFixture)
+	default:
+		// No-op: tests expecting "no data" for an unknown -t value get
+		// an empty body and exit 0 (matches dmidecode behavior).
+	}
+}
+
+const biosFixture = `# dmidecode 3.3
 Getting SMBIOS data from sysfs.
 SMBIOS 3.2.0 present.
 
@@ -20,5 +49,125 @@ BIOS Information
 	ROM Size: 32 MB
 	Characteristics:
 		PCI is supported
-		BIOS is upgradeable`)
-}
+		BIOS is upgradeable`
+
+const memoryFixture = `# dmidecode 3.3
+Getting SMBIOS data from sysfs.
+SMBIOS 3.2.0 present.
+
+Handle 0x0032, DMI type 17, 84 bytes
+Memory Device
+	Array Handle: 0x0031
+	Total Width: 64 bits
+	Data Width: 64 bits
+	Size: 16 GB
+	Form Factor: DIMM
+	Set: None
+	Locator: DIMM_A1
+	Bank Locator: BANK 0
+	Type: DDR4
+	Type Detail: Synchronous
+	Speed: 3200 MT/s
+	Manufacturer: Micron
+	Serial Number: 12345678
+	Asset Tag: None
+	Part Number: 8ATF2G64AZ-3G2E1
+	Rank: 2
+	Configured Memory Speed: 3200 MT/s
+
+Handle 0x0033, DMI type 17, 84 bytes
+Memory Device
+	Array Handle: 0x0031
+	Total Width: Unknown
+	Data Width: Unknown
+	Size: No Module Installed
+	Form Factor: DIMM
+	Set: None
+	Locator: DIMM_A2
+	Bank Locator: BANK 1
+	Type: Unknown
+	Type Detail: Unknown
+	Speed: Unknown
+	Manufacturer: Not Specified
+	Part Number: Not Specified
+
+Handle 0x0034, DMI type 17, 84 bytes
+Memory Device
+	Array Handle: 0x0031
+	Total Width: 64 bits
+	Data Width: 64 bits
+	Size: 16 GB
+	Form Factor: DIMM
+	Locator: DIMM_B1
+	Bank Locator: BANK 2
+	Type: DDR4
+	Speed: 3200 MT/s
+	Manufacturer: Micron
+	Part Number: 8ATF2G64AZ-3G2E1
+	Configured Memory Speed: 3200 MT/s
+
+Handle 0x0035, DMI type 17, 84 bytes
+Memory Device
+	Array Handle: 0x0031
+	Size: No Module Installed
+	Locator: DIMM_B2
+	Bank Locator: BANK 3
+	Manufacturer: Not Specified
+	Part Number: Not Specified`
+
+const systemFixture = `# dmidecode 3.3
+Getting SMBIOS data from sysfs.
+SMBIOS 3.2.0 present.
+
+Handle 0x0001, DMI type 1, 27 bytes
+System Information
+	Manufacturer: Beelink
+	Product Name: Mini S12 Pro
+	Version: Default string
+	Serial Number: SN-MINI-001
+	UUID: 03000200-0400-0500-0006-000700080009
+	Wake-up Type: Power Switch
+	SKU Number: Default string
+	Family: Default string`
+
+const baseboardFixture = `# dmidecode 3.3
+Getting SMBIOS data from sysfs.
+SMBIOS 3.2.0 present.
+
+Handle 0x0002, DMI type 2, 15 bytes
+Base Board Information
+	Manufacturer: Beelink
+	Product Name: AZW SEi
+	Version: 1.0
+	Serial Number: BB-0001
+	Asset Tag: Default string`
+
+const psuFixture = `# dmidecode 3.3
+Getting SMBIOS data from sysfs.
+SMBIOS 3.2.0 present.
+
+Handle 0x0040, DMI type 39, 22 bytes
+System Power Supply
+	Power Unit Group: 1
+	Location: PSU1
+	Name: PWR SPLY,760W
+	Manufacturer: DELTA
+	Serial Number: ABC123
+	Asset Tag: 00000000
+	Model Part Number: ABC760
+	Revision: 1.0
+	Max Power Capacity: 760 W
+	Status: Present, OK
+	Type: Switching
+
+Handle 0x0041, DMI type 39, 22 bytes
+System Power Supply
+	Power Unit Group: 1
+	Location: PSU2
+	Name: PWR SPLY,760W
+	Manufacturer: DELTA
+	Serial Number: XYZ789
+	Model Part Number: ABC760
+	Max Power Capacity: 760 W
+	Status: Present, OK
+	Type: Switching`