Add flowtrack period tracker

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

flake.lock

@@ -170,6 +170,26 @@
         "type": "github"
       }
     },
+    "flowtrack": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1792309033,
+        "narHash": "sha256-77igZpo8WI7XbLuAgD0HibkgdKao4efvvCjezdMqssQ=",
+        "ref": "refs/heads/main",
+        "rev": "94372c6abc7f93070eddd9d0ac35962a36567309",
+        "revCount": 1,
+        "type": "git",
+        "url": "https://forg.gregersen.it/rope/flowtrack"
+      },
+      "original": {
+        "type": "git",
+        "url": "https://forg.gregersen.it/rope/flowtrack"
+      }
+    },
     "fromYaml": {
       "flake": false,
       "locked": {
@@ -451,6 +471,7 @@
     },
     "root": {
       "inputs": {
+        "flowtrack": "flowtrack",
         "home-manager": "home-manager",
         "lanzaboote": "lanzaboote",
         "loupe": "loupe",