Validate and integrate fleet intelligence features

Fix atlas skip merge under lock, tolerate post-auth WS frames in tests,
and harden test-suite npm invocation on Windows.

agent/client/atlas_policy.go

@@ -14,8 +14,8 @@ type AtlasSkip struct {
 func (c *AgentClient) applyAtlasSkips(skips []AtlasSkip) {
 	c.mu.Lock()
 	c.atlasSkips = append([]AtlasSkip(nil), skips...)
+	c.mergeAtlasSkipsIntoPolicyLocked()
 	c.mu.Unlock()
-	c.mergeAtlasSkipsIntoPolicy()
 }
 
 func (c *AgentClient) atlasSkipsSnapshot() []AtlasSkip {
@@ -27,6 +27,10 @@ func (c *AgentClient) atlasSkipsSnapshot() []AtlasSkip {
 func (c *AgentClient) mergeAtlasSkipsIntoPolicy() {
 	c.mu.Lock()
 	defer c.mu.Unlock()
+	c.mergeAtlasSkipsIntoPolicyLocked()
+}
+
+func (c *AgentClient) mergeAtlasSkipsIntoPolicyLocked() {
 	if len(c.atlasSkips) == 0 {
 		return
 	}