Fix string slicing bounds error in metric parsing

Fixed critical bug where dashboard crashed with 'begin <= end' slice error
when parsing disk metrics with new naming format. Added bounds checking
to prevent invalid string slicing operations.

- Fixed extract_pool_name string slicing bounds check
- Removed ineffective panic handling that caused infinite loop
- Dashboard now handles new disk collector metrics correctly

Cargo.lock

@@ -279,7 +279,7 @@ checksum = "a1d728cc89cf3aee9ff92b05e62b19ee65a02b5702cff7d5a377e32c6ae29d8d"
 
 [[package]]
 name = "cm-dashboard"
-version = "0.1.110"
+version = "0.1.111"
 dependencies = [
  "anyhow",
  "chrono",
@@ -301,7 +301,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-agent"
-version = "0.1.110"
+version = "0.1.111"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -324,7 +324,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-shared"
-version = "0.1.110"
+version = "0.1.111"
 dependencies = [
  "chrono",
  "serde",