Format drifted files to satisfy the treefmt flake-check gate

Pure formatting (nixfmt/prettier/yamlfmt); no behavior change. These
files predate the current treefmt config and were failing nix flake
check; reformatting them makes the gate green again.

docs/src/overview.md

@@ -7,7 +7,7 @@ this book is built from `docs/` and served on `control` over the ZeroTier mesh.
 ## Machines
 
 | Machine   | Role                                  | Public IPv4      | Public IPv6             |
-| --------- | -------------------------------------- | ---------------- | --------------------------- |
+| --------- | ------------------------------------- | ---------------- | ----------------------- |
 | `control` | ZeroTier controller, monitoring, docs | `77.42.68.181`   | `2a01:4f9:c013:e6d0::1` |
 | `ns1`     | Knot DNS **primary** (master)         | `46.224.170.206` | `2a01:4f8:c014:b5c5::1` |
 | `ns2`     | Knot DNS **secondary** (slave)        | `157.180.70.82`  | `2a01:4f9:c014:6d87::1` |

modules/dns/authoritative.nix

@@ -1,4 +1,9 @@
-{ config, lib, pkgs, ... }:
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
 let
   # ZeroTier addresses — zone transfers run over the mesh, not the public net.
   mesh = import ../mesh-hosts.nix { inherit config lib; };

modules/mesh-hosts.nix

@@ -11,8 +11,7 @@ let
   dir = config.clan.core.settings.directory;
 
   readVar =
-    machine: file:
-    builtins.readFile "${dir}/vars/per-machine/${machine}/zerotier/${file}/value";
+    machine: file: builtins.readFile "${dir}/vars/per-machine/${machine}/zerotier/${file}/value";
 
   hosts = lib.genAttrs [ "control" "ns1" "ns2" "mx1" ] (m: readVar m "zerotier-ip");
 

modules/monitoring/dashboards/backups.json

@@ -26,7 +26,10 @@
       "fieldConfig": {
         "defaults": {
           "color": { "mode": "thresholds" },
-          "thresholds": { "mode": "absolute", "steps": [{ "color": "green", "value": null }] },
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [{ "color": "green", "value": null }]
+          },
           "noValue": "no data",
           "mappings": [
             {
@@ -41,7 +44,11 @@
         "overrides": []
       },
       "options": {
-        "reduceOptions": { "calcs": ["lastNotNull"], "fields": "", "values": false },
+        "reduceOptions": {
+          "calcs": ["lastNotNull"],
+          "fields": "",
+          "values": false
+        },
         "colorMode": "background",
         "graphMode": "none",
         "textMode": "auto",
@@ -72,7 +79,11 @@
         "overrides": []
       },
       "options": {
-        "reduceOptions": { "calcs": ["lastNotNull"], "fields": "", "values": false },
+        "reduceOptions": {
+          "calcs": ["lastNotNull"],
+          "fields": "",
+          "values": false
+        },
         "colorMode": "none",
         "graphMode": "none",
         "textMode": "auto",
@@ -110,7 +121,11 @@
         "overrides": []
       },
       "options": {
-        "reduceOptions": { "calcs": ["lastNotNull"], "fields": "", "values": false },
+        "reduceOptions": {
+          "calcs": ["lastNotNull"],
+          "fields": "",
+          "values": false
+        },
         "colorMode": "background",
         "graphMode": "none",
         "textMode": "auto",
@@ -168,7 +183,10 @@
       "id": 6,
       "datasource": { "type": "prometheus", "uid": "victoriametrics" },
       "gridPos": { "h": 8, "w": 12, "x": 12, "y": 6 },
-      "fieldConfig": { "defaults": { "unit": "short", "min": 0, "max": 1 }, "overrides": [] },
+      "fieldConfig": {
+        "defaults": { "unit": "short", "min": 0, "max": 1 },
+        "overrides": []
+      },
       "targets": [
         {
           "refId": "A",

modules/monitoring/dashboards/dns.json

@@ -224,7 +224,10 @@
       "options": { "showHeader": true },
       "fieldConfig": {
         "defaults": {
-          "custom": { "align": "auto", "cellOptions": { "type": "color-background" } },
+          "custom": {
+            "align": "auto",
+            "cellOptions": { "type": "color-background" }
+          },
           "thresholds": {
             "mode": "absolute",
             "steps": [
@@ -245,15 +248,21 @@
         "overrides": [
           {
             "matcher": { "id": "byName", "options": "zone" },
-            "properties": [{ "id": "custom.cellOptions", "value": { "type": "auto" } }]
+            "properties": [
+              { "id": "custom.cellOptions", "value": { "type": "auto" } }
+            ]
           },
           {
             "matcher": { "id": "byName", "options": "query" },
-            "properties": [{ "id": "custom.cellOptions", "value": { "type": "auto" } }]
+            "properties": [
+              { "id": "custom.cellOptions", "value": { "type": "auto" } }
+            ]
           },
           {
             "matcher": { "id": "byName", "options": "instance" },
-            "properties": [{ "id": "custom.cellOptions", "value": { "type": "auto" } }]
+            "properties": [
+              { "id": "custom.cellOptions", "value": { "type": "auto" } }
+            ]
           }
         ]
       },
@@ -283,7 +292,10 @@
       "id": 22,
       "datasource": { "type": "prometheus", "uid": "victoriametrics" },
       "gridPos": { "h": 8, "w": 12, "x": 12, "y": 43 },
-      "fieldConfig": { "defaults": { "unit": "short", "min": 0, "max": 1 }, "overrides": [] },
+      "fieldConfig": {
+        "defaults": { "unit": "short", "min": 0, "max": 1 },
+        "overrides": []
+      },
       "targets": [
         {
           "refId": "A",