feat: implement local P1 contracts and Mock call flow

deploys/env/dispatcher.env.example

@@ -3,7 +3,9 @@
 # its example dispatcher_id with this installation's unique stable UUID v4.
 SIP_GO_AGENT_MODE=real
 DISPATCHER_DB=/var/lib/sip-go-agent/dispatcher/dispatcher.db
-DISPATCHER_TENANT_KEY=<approved-original-tenant-key>
+# Required by the current V3 runtime; inject approved values out of band.
+# DISPATCHER_CONFIG_READ_BASE_URL=<injected-config-read-base-url>
+# DISPATCHER_SECRET_KEY=<injected-secret>
 # RABBITMQ_URL=<injected-broker-url>
 DISPATCHER_AGENT_ENDPOINTS_FILE=/etc/sip-go-agent/agent-endpoints.json
 MTLS_CA_FILE=/etc/sip-go-agent/pki/ca.pem

deploys/systemd/sip-go-agent-dispatcher.service

@@ -9,7 +9,7 @@ User=rogee
 Group=rogee
 WorkingDirectory=/opt/sip-go-agent/current
 EnvironmentFile=/etc/sip-go-agent/dispatcher.env
-ExecStart=/opt/sip-go-agent/current/sip-go-agent dispatcher --config /etc/sip-go-agent/dispatcher.json --consume --tenant-key ${DISPATCHER_TENANT_KEY}
+ExecStart=/opt/sip-go-agent/current/sip-go-agent dispatcher --config /etc/sip-go-agent/dispatcher.json
 Restart=on-failure
 RestartSec=5s
 NoNewPrivileges=yes