Statistics on ME + Dynamic backpressure + KDF with SOCKS

Co-Authored-By: brekotis <93345790+brekotis@users.noreply.github.com>

src/stats/telemetry.rs

@@ -0,0 +1,29 @@
+use crate::config::{MeTelemetryLevel, TelemetryConfig};
+
+/// Runtime telemetry policy used by hot-path counters.
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct TelemetryPolicy {
+    pub core_enabled: bool,
+    pub user_enabled: bool,
+    pub me_level: MeTelemetryLevel,
+}
+
+impl Default for TelemetryPolicy {
+    fn default() -> Self {
+        Self {
+            core_enabled: true,
+            user_enabled: true,
+            me_level: MeTelemetryLevel::Normal,
+        }
+    }
+}
+
+impl TelemetryPolicy {
+    pub fn from_config(cfg: &TelemetryConfig) -> Self {
+        Self {
+            core_enabled: cfg.core_enabled,
+            user_enabled: cfg.user_enabled,
+            me_level: cfg.me_level,
+        }
+    }
+}