feat(clan): re-enable dm-pull-deploy via forked clan-community 🌊

Stage 4e, take 2. Point the clan-community input at our fork's branch
that sanitizes machine.name for data-mesher's file-name validator
(upstream PR: clan/clan-community#25). Revisit this pin once merged.

- flake.nix: clan-community.url → fork + fix branch
- flake-modules/clan.nix: re-adds meta.domain = "clan",
  inventory.instances.data-mesher (sunken-ship bootstrap, both default),
  inventory.instances.dm-pull-deploy (sunken-ship push, both default
  action="switch"), and clanHostsModule that puts /etc/hosts entries
  for <host>.clan → each machine's ZT IPv6 so libp2p multiaddr
  resolution works without a clan-domain DNS server.
- Generator vars for data-mesher + dm-pull-deploy signing keys were
  regenerated on sunken-ship (data-mesher isn't packaged for
  aarch64-darwin, so clan vars generate runs on Linux).

vars/per-machine/sunken-ship/data-mesher-node-identity/identity.key/machines/sunken-ship

@@ -0,0 +1 @@
+../../../../../../sops/machines/sunken-ship

vars/per-machine/sunken-ship/data-mesher-node-identity/identity.key/secret

@@ -0,0 +1,18 @@
+{
+	"data": "ENC[AES256_GCM,data:UhTbEIclwoIKcQaAMS/ZNkGrgg3HqkA3SHVBSHJ+wBI6x4i3dnAfIi08NstykkaKfMSJX0ELADiXu9rAqC/XHLHChYJ9yp9bdV/FzhaHHiJ61uVPSpgeJf9lPmirG5cNx15my3vFu9iElNuVoj1SrQJCOHdtw98=,iv:dJV6lBytRAyVyuLIGu8I7rYYd4ybKea7/j9ZMMRB5ck=,tag:QgTQApvKJAsFN2Gpxyse0g==,type:str]",
+	"sops": {
+		"age": [
+			{
+				"recipient": "age1g6y8gvcampqj5y3yzdajke2h5n7k6ckdg6a424cghy5325px7cmqjmmd28",
+				"enc": "-----BEGIN AGE ENCRYPTED FILE-----\nYWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSAybjQ2MDMwTUtOZDRsc1pV\nYnhTK1FMZkVZcElSVVQwNkc0V0w1aGY1VDE4ClUwMlA3VlBLTTF0bDRBWEZsTDZK\nNzlTcWtFU0w3dEdMcmVSVWJQSndNbXcKLS0tIEZEUXFwd2JaUDNDVDh5aFVWL20y\nSGFJUVUvMmZwOTFsZEhhZHFHRXJKODgKbySNJmTEDJ+0HxsmFuaIUWzLZ47HvATg\nxuYsiSXJGnermo4yxgRuisX68wLzaTVMRfdV7cK9Mqzq0gDOi6s/VQ==\n-----END AGE ENCRYPTED FILE-----\n"
+			},
+			{
+				"recipient": "age1zy3q73pujauyajgfqwu0pnyy8732lzwvw87tu7p2xg3xuzaujc2qh6ql77",
+				"enc": "-----BEGIN AGE ENCRYPTED FILE-----\nYWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSB2Q3R6L2Q3ZFRKMmFqbkdT\nK1lTOGRtK2tvVk5yZXpsN1hvR0laWTZHQ1dFCkphNzB1dE5TbWJrQU8va202UXRT\nSkdZM3FpZ2VWOExhaVVNMHROd1drb2sKLS0tIGZtZHZ2VzZJMi9tcHFMSGpodFk4\nbjlnd3NvMHdXSEovQ0txT2J2N1lzeTAKxpCIqP3TNazm96Zxsk+rhwY9CVj9cIDl\nBelBCK7fOSodayheZkAIcnOWUDGOOMuFqXGDo/HC2HmzyJsco5KkMg==\n-----END AGE ENCRYPTED FILE-----\n"
+			}
+		],
+		"lastmodified": "2026-04-20T17:57:27Z",
+		"mac": "ENC[AES256_GCM,data:uHHOi9nYi+6QKOxjmLeOUH+0oVWvSYLWc9Vkryx1ADo58GjS4BwgFcXJaw+bnGPy1lvZzA0MdqSFL5Fb/9mFVZpt0PMGD1YjGkr8dZN2eZOYbH7ysBjv91GIDewGOpKGJQKQhmMuwfE1MkaBk6WfRD5IAK6fged+0Jr+CGE81jc=,iv:Wu0aPXx41nIr4MQGAW/4rpSbHNtdlgu+IxEP6oISINg=,tag:qLRQhOma2ly3kkRHVMYgbA==,type:str]",
+		"version": "3.12.2"
+	}
+}

vars/per-machine/sunken-ship/data-mesher-node-identity/identity.key/users/danny

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