telephony: make TTS cutover EFFECTIVE via Tts__PiperUrl env (overrides configmap)

Root cause: the live deploy carried env Tts__PiperUrl=edge1 (drifted, not in git)
which shadows appsettings Tts.PiperUrl. Codify Tts__PiperUrl=GX10 + Ari__ env to
match live so git is source-of-truth; the configmap edit alone was inert.

apps/telephony/telephony.yaml

@@ -188,6 +188,16 @@ spec:
                   name: twilio-credentials
                   key: DefaultFromNumber
                   optional: true
+            # Env vars OVERRIDE appsettings.Production.json in ASP.NET Core config.
+            # These were previously applied live-only (kubectl) and drifted from git;
+            # codified here so git is the source of truth. Tts__PiperUrl is the real
+            # TTS cutover lever (the configmap "Tts" block is shadowed by this env).
+            - name: Tts__PiperUrl
+              value: "http://10.0.56.14:30850"   # GX10 amy-medium; edge1 10.0.57.17:8500 = rollback
+            - name: Ari__Username
+              value: "flowercore"
+            - name: Ari__Password
+              value: "bluejay-asterisk-ari"
           volumeMounts:
             - name: telephony-config
               mountPath: /app/appsettings.Production.json