Import the wilm endpoint telemetry, PC Detail rework and backup overlay

Ports 37 of Benjamin Baker's commits from the wilm branch, mirrored from the
corporate GitHub at 7905917c. wilm rides the publication lineage and shares no
ancestor with wj, so this is a filtered tree patch rather than a merge:
94 files, and every path the publication export strips (docs/, tools/, mcp/,
CLAUDE.md, start-*.sh, .gitea/, the three excluded tests) is held back, because
a raw diff would delete each of them from this tree.

What comes across:

* Endpoint telemetry, phase 2. Physical disk health from two sources, NIC link
  state, boot type, Defender health, processor/memory/chassis inventory, the
  listening TCP set, mapped network drives and Windows Update history. Five
  additive migrations, 0012 through 0016, off the 0011 head.
* Mapped drives are collected by a probe running in the interactive user's
  session, because they do not exist in the agent's session 0. Two Windows
  sources can disagree about one drive and the worse status wins, so a
  half-broken share is never rendered as healthy.
* Windows events are reported once each, keyed on the channel's own record id,
  instead of being re-sent whenever a report overlapped the last one.
* PC Detail rework: Details cards flow, the hand-written Network card gives way
  to a full address history, Storage and disk health merge into one card with
  two sections, Operator Reports and Corporate Tools get their own tabs.
* An opt-in restic backup overlay with a third container, restore gated on the
  dump's own data revision rather than the code head, and backup/restore history.
* The agent's version is read from the binary's PE version rather than trusted
  from the csproj, and the Fleet view gains an Agent Version column.
* The enqueue route now asks caller_holds instead of the owner's permissions,
  which closes the scoped-token elevation on run_script, update_app and
  system_restart.

Held back deliberately:

* agent/installer/install-shopdbagent.ps1 stays deleted, as upstream deleted it.
  The installer that reaches a bay is generated by _install_script() in
  plugins/endpoints/api/siteagent.py; the standalone script had stopped being
  shipped and was collecting fixes no endpoint ever ran.
* The .gitignore hunk adding docs/*.md. Correct on the publication lineage,
  where docs/ becomes the wiki and its absence is how the gates detect a
  published checkout. Here it would silently ignore every new doc.
* Their deletions of docs/DEV-BUILD-TEST.md and docs/PLUGIN-HOOKS.md. Upstream
  those were stubs; here PLUGIN-HOOKS.md is the 31KB document CLAUDE.md points
  readers at.
* Five zero-byte files committed by an accidental `git add -A`, a run log from
  the author's own machine, and docs/notes/, which is working scratch that says
  so in its own header and belongs in devnotes/ on this side.

Carried with the import so it lands green: the 17 new routes are described in
docs/api-inventory.json with the spec and project map regenerated, and two new
frontend specs read fixtures through fileURLToPath(URL) which node rejects under
jsdom's own URL global.

Suite 2591 passed / 9 skipped; frontend 391 passed; naming, style and doc gates
clean.

Scope: product

scripts/uninstall-shopdbagent.ps1

@@ -1,10 +1,11 @@
 # uninstall-shopdbagent.ps1
 # ShopDB Endpoint Agent uninstaller. Run from an ELEVATED (admin) PowerShell on
-# the endpoint. Reverses everything install-shopdbagent.ps1 and the site agent
-# generator's install.ps1 create:
+# the endpoint. Reverses everything the site agent generator's install.ps1
+# creates:
 #   - stops and deletes the Windows service
 #   - kills any running agent/tray processes
 #   - removes the tray logon Run key (64-bit and 32-bit views)
+#   - unregisters the ShopDB user-context probe scheduled task
 #   - removes the credential hive HKLM\SOFTWARE\GE\ShopDB (both views)
 #   - removes the Defender path exclusion for the install directory
 #   - deletes the install directory and the ProgramData data/log tree
@@ -20,6 +21,10 @@ param(
 	[string] $ServiceName = "ShopDbEndpointAgent",
 	[string] $TrayExeName = "shopdb-endpoint-tray.exe",
 
+	# Scheduled task that runs the user-context probe in the operator's session.
+	# Must match the installer's -UserContextTaskName.
+	[string] $UserContextTaskName = "ShopDB user-context probe",
+
 	# Also remove any server TLS certificate the site-agent installer imported
 	# into the machine Trusted Root store. Off by default because a root cert is
 	# shared trust material: only pull it when you are sure no other service on
@@ -113,6 +118,34 @@ Start-Sleep -Seconds 1
 # 3. Remove the tray logon Run key entry (both views) and the credential hive.
 Write-Host "[3/6] Removing registry entries ..."
 Remove-HklmBothViews -SubKey "SOFTWARE\Microsoft\Windows\CurrentVersion\Run" -Name "ShopDbEndpointTray"
+
+# Unregister the probe task. Left behind it would keep firing at every logon
+# against a deleted exe, which shows up as a recurring task-failure history on a
+# machine nobody believes has the agent on it any more.
+try {
+	if (Get-ScheduledTask -TaskName $UserContextTaskName -ErrorAction SilentlyContinue) {
+		Unregister-ScheduledTask -TaskName $UserContextTaskName -Confirm:$false -ErrorAction Stop
+		Write-Host "  removed scheduled task '$UserContextTaskName'"
+	}
+	else {
+		Write-Host "  scheduled task '$UserContextTaskName' not present."
+	}
+}
+catch {
+	Write-Warning "  could not remove scheduled task '$UserContextTaskName': $($_.Exception.Message)"
+}
+
+# The install's one-shot tray launcher is transient and normally removes itself,
+# but an install that failed partway can leave it behind.
+try {
+	if (Get-ScheduledTask -TaskName "ShopDB tray first launch" -ErrorAction SilentlyContinue) {
+		Unregister-ScheduledTask -TaskName "ShopDB tray first launch" -Confirm:$false -ErrorAction Stop
+		Write-Host "  removed leftover scheduled task 'ShopDB tray first launch'"
+	}
+}
+catch {
+	Write-Warning "  could not remove scheduled task 'ShopDB tray first launch': $($_.Exception.Message)"
+}
 Remove-HklmBothViews -SubKey "SOFTWARE\GE\ShopDB"
 
 # Remove the All-Users Start Menu shortcut the site-agent installer created.