ax(mining): replace prose type comments with usage examples in mining_profile.go

RawConfig and MiningProfile had description-style comments restating what
the types are rather than showing how to use them (AX Principle 2 violation).
Replaced with concrete call-site examples demonstrating real usage patterns.

Co-Authored-By: Charon <charon@lethean.io>

pkg/mining/mining_profile.go

@@ -1,13 +1,12 @@
 package mining
 
 
-// RawConfig is a raw encoded JSON value.
-// It implements Marshaler and Unmarshaler and can be used to delay JSON decoding or precompute a JSON encoding.
-// We define it as []byte (like json.RawMessage) to avoid swagger parsing issues with the json package.
+// var raw RawConfig
+// _ = json.Unmarshal([]byte(`{"pool":"pool.lthn.io:3333"}`), &raw)
 type RawConfig []byte
 
-// MiningProfile represents a saved configuration for running a specific miner.
-// It decouples the UI from the underlying miner's specific config structure.
+// profile := MiningProfile{ID: "abc", Name: "LTHN RandomX", MinerType: "xmrig", Config: raw}
+// manager.SaveProfile(profile)
 type MiningProfile struct {
 	ID        string    `json:"id"`
 	Name      string    `json:"name"`