Bring codebase into compliance with bible contracts (A–E)

A (hardware-ingest-json v2.8-2.9): remove sensor location fields from schema
and collector; tag HardwareMemory.Location as json:"-"; add PlatformConfig to
HardwareSnapshot.

B (no-hardcoded-vendors): consolidate PCI vendor IDs into collector/pci_vendors.go;
replace all vendor-name string checks in isGPUDevice, isNVIDIADevice, isMellanoxDevice,
isAMDGPUDevice, matchesGPUVendor (sat_overlay), and validateIsVendorGPU (page_validate)
with numeric vendor_id comparisons.

C (module-structure): split app/app.go (1413 lines) into app.go + app_format.go,
app_network.go, app_services.go, app_packs.go, app_install.go — no logic changes.

D (go-code-style): wrap bare return err in interfaceAdminState and
interfaceIPv4Addrs (platform/network.go) with fmt.Errorf context including
the interface name.

E (go-project-bible): add bible-local/architecture/data-model.md and
bible-local/architecture/api-surface.md.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

audit/internal/platform/network.go

@@ -258,7 +258,7 @@ func (s *System) GetInterfaceState(iface string) (bool, error) {
 func interfaceAdminState(iface string) (bool, error) {
 	raw, err := exec.Command("ip", "-o", "link", "show", "dev", iface).Output()
 	if err != nil {
-		return false, err
+		return false, fmt.Errorf("ip link show dev %s: %w", iface, err)
 	}
 	return parseInterfaceAdminState(string(raw))
 }
@@ -288,7 +288,7 @@ func interfaceIPv4Addrs(iface string) ([]string, error) {
 		if errors.As(err, &exitErr) {
 			return nil, nil
 		}
-		return nil, err
+		return nil, fmt.Errorf("ip addr show dev %s: %w", iface, err)
 	}
 	var ipv4 []string
 	for _, line := range strings.Split(strings.TrimSpace(string(raw)), "\n") {