docs: unify header to import path for package docs

internal/metrics/README.md

@@ -1,4 +1,4 @@
-# Metrics Package
+# internal/metrics
 
 System monitoring and metrics collection for GoDoxy with time-series storage and REST/WebSocket APIs.
 

internal/metrics/period/README.md

@@ -1,4 +1,4 @@
-# Period Metrics
+# internal/metrics/period
 
 Provides time-bucketed metrics storage with configurable periods, enabling historical data aggregation and real-time streaming.
 
@@ -453,7 +453,7 @@ for {
 - O(1) add to circular buffer
 - O(1) get (returns slice view)
 - O(n) serialization where n = total entries
-- Memory: O(5 * 100 * sizeof(T)) = fixed overhead
+- Memory: O(5 _ 100 _ sizeof(T)) = fixed overhead
 - JSON load/save: O(n) where n = total entries
 
 ## Testing Notes

internal/metrics/systeminfo/README.md

@@ -1,4 +1,4 @@
-# System Info
+# internal/metrics/systeminfo
 
 Collects and aggregates system metrics including CPU, memory, disk, network, and sensor data with configurable aggregation modes.
 
@@ -367,7 +367,7 @@ curl "http://localhost:8080/api/metrics/system?period=1h&aggregate=disks_read_sp
 
 ```javascript
 const ws = new WebSocket(
-  "ws://localhost:8080/api/metrics/system?period=1m&interval=5s&aggregate=cpu_average"
+  "ws://localhost:8080/api/metrics/system?period=1m&interval=5s&aggregate=cpu_average",
 );
 
 ws.onmessage = (event) => {

internal/metrics/uptime/README.md

@@ -1,4 +1,4 @@
-# Uptime
+# internal/metrics/uptime
 
 Tracks and aggregates route health status over time, providing uptime/downtime statistics and latency metrics.