Add comprehensive tests for ServerCollectionOps (#696)

* Test ServerCollectionOps data manipulation utilities

Added comprehensive unit tests for `ServerCollectionOps.kt` to cover all scenarios for `addOrUpdate`, `selfHealed`, and resolution properties (`resolvedBaseUrl`, `resolvedHost`, `resolvedPort`). Also updated the function name `addOrReplaceServer` to `addOrUpdate` to match the intended signature in the issue description, and updated affected call sites.

* Fix ktlint formatting issues and ensure build succeeds

Fixed ktlint errors in `ServerCollectionOpsTest.kt` by correctly formatting arguments and expressions to comply with project style guidelines. Ran `assembleDebug` and tests locally to verify build health.

app/src/main/java/com/m57/hermescontrol/data/config/ServerCollectionOps.kt

@@ -3,7 +3,7 @@ package com.m57.hermescontrol.data.config
 import com.m57.hermescontrol.data.remote.CleartextPolicy
 import com.m57.hermescontrol.data.remote.ServerEndpoint
 
-fun ServerStoreState.addOrReplaceServer(profile: ConnectionProfile): ServerStoreState {
+fun ServerStoreState.addOrUpdate(profile: ConnectionProfile): ServerStoreState {
     val updated = connectionProfiles.filter { it.id != profile.id } + profile
     return copy(connectionProfiles = updated)
 }