clanService/phonebox-global: decentralized phone network over yggdrasil

New service alongside phonebox. Boxes get a random 6 digit number
(100000-999999) signed by the machine's yggdrasil key. A serf gossip
cluster on yggdrasil port 7946 exchanges the signed records;
phonebox-sync verifies key -> address derivation and the signature and
writes the number -> address map to /run/phonebox/numbers for the
asterisk dialplan. Any yggdrasil node running the service can reach any
other; clan-core's ygg-input filter is opened for SIP, RTP and gossip.

Includes a two-node VM test proving directory convergence and a call
over yggdrasil. The existing phonebox service is untouched.

modules/clan/phonebox-global/tests/vm/vars/per-machine/server/phonebox-global/number/value

@@ -0,0 +1 @@
+981794

modules/clan/phonebox-global/tests/vm/vars/per-machine/server/phonebox-global/owner-name/value

@@ -0,0 +1 @@
+fake_line_value

modules/clan/phonebox-global/tests/vm/vars/per-machine/server/phonebox-global/public-key/value

@@ -0,0 +1 @@
+7291692f9a94948724377fc22055edde8e2773a581153317bc20bd5779736647

modules/clan/phonebox-global/tests/vm/vars/per-machine/server/phonebox-global/signature/value

@@ -0,0 +1 @@
+IwAOYcmClqi8K8EStthYMqWCr6WsxM3nD0CLDRvvb7I3CUyihXBjdghXLutDD/bFsHKzOkDVV/gLnTuRj9IEAg==

modules/clan/phonebox-global/tests/vm/vars/per-machine/server/state-version/version/value

@@ -0,0 +1 @@
+26.11

modules/clan/phonebox-global/tests/vm/vars/per-machine/server/yggdrasil/address/value

@@ -0,0 +1 @@
+201:35ba:5b41:95ad:ade3:6f22:f7:7ea8

modules/clan/phonebox-global/tests/vm/vars/per-machine/server/yggdrasil/privateKey/machines/server

@@ -0,0 +1 @@
+../../../../../../sops/machines/server

modules/clan/phonebox-global/tests/vm/vars/per-machine/server/yggdrasil/privateKey/secret

@@ -0,0 +1,18 @@
+{
+	"data": "ENC[AES256_GCM,data:H1ngxnRS+cFNSxe9K7C/xNS5hzXyeTWBLZI18TPvEyT5l/MSBeRuK6FZ/G0xUGQAJw4Xo1nyX2PZEYH5wjhnG0UziKAZeM2Oe0G/ilpNbHeMS+HLVriDETlMQz2Hf4Y1J6jOZqSTgFuPMVG5armpZUYTcW+p2zo=,iv:u9sO6eiFzxtT7uImnHLXT3aYJJxgby8d5H2ckfZdNIw=,tag:ZLl7AHHRF+jmr0tnujrpIg==,type:str]",
+	"sops": {
+		"age": [
+			{
+				"enc": "-----BEGIN AGE ENCRYPTED FILE-----\nYWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBzdy9HVVFoa0N5ZnBDVDhM\ncm1vQzR3MUpSbW9KSjE0YmZueUlsY1gvUVc4CmlqaTBxMTNvZzdmdkJSMmMwN01N\nVGsvUzJ5Q055Tmk2L2ZUNjRpSHp0bE0KLS0tIGJhUUNDbGh1a09aeXMzWkl4K0F0\nZ0dYY1FnNCtkVXRVTVkyeXZPbFlVbUUK3a/V6XP6m8MDYPKwlu8z0cr4inuKGGNc\nYJjQw00ou3BdM/HOPZrMjYHtjg5WdtzYiFCOl8IRkeiDaEmXcOBjiw==\n-----END AGE ENCRYPTED FILE-----\n",
+				"recipient": "age1qm0p4vf9jvcnn43s6l4prk8zn6cx0ep9gzvevxecv729xz540v8qa742eg"
+			},
+			{
+				"enc": "-----BEGIN AGE ENCRYPTED FILE-----\nYWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBSbW9lcXZweHZ6b0F1eVIy\nd2RWV2lkOHpoM2RkZWxSVEFwU1h5aXNMWldnCk5lS1E4b1BDMmRYUDNHK2NhTlVT\nWGpLWm4rUnpFVWNvMHNzclJuemNGZkEKLS0tIGZxcmowODUydm1kL24yVHd4YXl4\nWVd5eWZMZ0dyS2dpTDhuNXo4S25Ha0EKvc3hwrmlP5JcH7eQeRfoq40w/QdnQL8s\n+DAwsajzRp6H3/XVTm+nDQ+Qoc3aenewZkk6Pgn+x43hAh9zwuvGkA==\n-----END AGE ENCRYPTED FILE-----\n",
+				"recipient": "age1sy8xkmssttcchjj0nkapk4tu530lrzszdp4lka6nn4gzlxam6e2s3xzp2j"
+			}
+		],
+		"lastmodified": "2026-09-18T02:02:24Z",
+		"mac": "ENC[AES256_GCM,data:xrshyxQAnlSORTzxxcpt0ABaNWSCCVnwHl6oPUQ59reumF7BoAy8HmdSyWeEpIKBNo2Ane1xxXBHa62+w58r0WjcneNzy8yIBBwXr1BIRZPX83HrSz3+bENPtj6TPWdHpFZ5aDFM2jVlUvwIkn/4g+1B9FnQtoH8kuYBGe2uGCM=,iv:slMt0ag3Kp3iD89jQa/YDta4mJccKiSqcTCt8C+1Dzs=,tag:o56eg/BSHOtBUeNQqRjQDg==,type:str]",
+		"version": "3.13.3"
+	}
+}

modules/clan/phonebox-global/tests/vm/vars/per-machine/server/yggdrasil/privateKey/users/admin

@@ -0,0 +1 @@
+../../../../../../sops/users/admin

modules/clan/phonebox-global/tests/vm/vars/per-machine/server/yggdrasil/publicKey/value

@@ -0,0 +1 @@
+7291692f9a94948724377fc22055edde8e2773a581153317bc20bd5779736647