Fix duplicate data by clearing vectors before collection

Collectors now clear their target vectors (tmpfs, drives, pools, services)
before populating to prevent duplicates when updating cached AgentData.

- Clear tmpfs list in memory collector
- Clear drives and pools in disk collector
- Clear services in systemd collector
- Bump version to v0.1.231

Cargo.lock

@@ -279,7 +279,7 @@ checksum = "a1d728cc89cf3aee9ff92b05e62b19ee65a02b5702cff7d5a377e32c6ae29d8d"
 
 [[package]]
 name = "cm-dashboard"
-version = "0.1.230"
+version = "0.1.231"
 dependencies = [
  "anyhow",
  "chrono",
@@ -301,7 +301,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-agent"
-version = "0.1.230"
+version = "0.1.231"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -325,7 +325,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-shared"
-version = "0.1.230"
+version = "0.1.231"
 dependencies = [
  "chrono",
  "serde",