homepage: add UniFi UDM cards; docs: nav map + remove misfiled artifact

- services.yaml: PFI-UDMSE (10.100.0.1, NH3 edge) under Infra - NH3,
  ESH-UDMPM (10.0.0.1) under Infra - ESH. PFI-UDMSE replaces the
  retired Fortigate 101F at NH3 — comment updated. Both use si-ubiquiti.
  Diff also folds in the previously-deployed-but-uncommitted PBS-ANA /
  PBS-NH3 / IRV section / retired NH3-SW1 cleanup, bringing the tracked
  copy in sync with what's live on esh-docker-vm.
- docs/README.md: navigation map of the docs/ tree (orientation /
  runbooks / pfi) with what-goes-where conventions.
- docs/runbooks/tea-0.14.0-linux-amd64.sha256: deleted (build artifact,
  not a runbook).
- STATUS.md: items 11 / 13 / 15 marked done; 15 leaves Matrix and
  chromadb consolidation candidates as future focused-session work.

docs/README.md

@@ -0,0 +1,53 @@
+# docs/
+
+Navigation map for the documentation tree. New session? Read
+[`orientation.md`](orientation.md) first — it's the narrative overview
+of the fleet, backup architecture, governing principles, and gotchas,
+and it points at everything else.
+
+## Tree
+
+```
+docs/
+├── orientation.md            # start here — fleet overview + where-to-look guide
+├── runbooks/                 # ops runbooks (recovery, deployment phases)
+│   ├── disaster-recovery.md
+│   └── pbs-deployment.md
+└── pfi/                      # PFI-specific reference (services, models, VMs)
+    ├── chromadb-setup.md
+    ├── docker-stack.md
+    ├── model-list.md
+    ├── proxmox-vms.md
+    ├── recommended-model-settings.md
+    ├── vm-102-matrix-appservice.md
+    └── vm-102-matrix-synapse.md
+```
+
+## What goes where
+
+- **`runbooks/`** — step-by-step ops procedures. Anything you'd reach
+  for during an incident or while standing up new infrastructure.
+  Examples: disaster recovery (blast-radius tiers + restoration steps),
+  PBS deployment (9-phase rollout). New runbook → new file here.
+- **`pfi/`** — PFI-specific reference material that's too narrow for the
+  top-level CLAUDE.md but doesn't change incident response. AI model
+  inventory, recommended inference settings, Matrix bridge config,
+  Proxmox VM map. New stable reference → new file here.
+- **Top-level (`docs/orientation.md`, `docs/README.md`)** — narrative
+  guides about the workspace itself, not about specific infra.
+
+## Cross-references
+
+- Fleet topology + servers table: top-level [`CLAUDE.md`](../CLAUDE.md).
+- Open work + recent milestones: top-level [`STATUS.md`](../STATUS.md).
+- Durable cross-session facts: `~/.claude/projects/-home-lkraven-development-eshpfi-management/memory/`.
+
+## Conventions
+
+- Markdown, GitHub-flavored. CommonMark renders fine in most viewers.
+- File names are lowercase-kebab-case, descriptive. No dates in
+  filenames — git history covers that.
+- One topic per file. If a file grows past ~500 lines, look for a
+  natural split before adding more.
+- No checked-in binaries or checksums. Build/release artifacts belong
+  in a build pipeline or `tools/`, not `docs/`.