Add pool information to VM metrics

- Parse /etc/pve/user.cfg to extract pool membership for VMs
- Add pool-related labels to pve_kvm info metrics:
  - pool: Full hierarchical pool name
  - pool_levels: Number of pool hierarchy levels
  - pool1/pool2/pool3: Individual pool hierarchy levels
- Cache pool data based on file modification time to avoid repeated reads

LICENSE

@@ -1,21 +0,0 @@
-MIT License
-
-Copyright (c) 2024 Harikrishnan R
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.

flake.nix

@@ -14,7 +14,7 @@ rec {
 		packages.x86_64-linux = with nixpkgs.legacyPackages.x86_64-linux; rec {
 			pvemon = python3Packages.buildPythonApplication {
 				pname = "pvemon";
-				version = "1.3.0";
+				version = "1.2.0";
 				src = ./src;
 				propagatedBuildInputs = with python3Packages; [
 					pexpect

src/setup.py

@@ -2,7 +2,7 @@ from setuptools import setup, find_packages
 
 setup(
     name='pvemon',
-    version = "1.3.0",
+    version = "1.2.0",
     packages=find_packages(),
     entry_points={
         'console_scripts': [