Phone directory foundation: NPC contacts + phone node + terminal→NPC

NPCs gain phone_number and email (the phone book). A new 'phone' node type
holds a directory whose terminals each bind to an NPC via npc_id (the callee
reached by dialing that number) and wire to the dialogue that plays on
connect. Migration 029 adds the columns/type; repositories and admin API
thread contacts and the per-terminal NPC binding. Authoring foundation only
— the dial runtime and tools sidebar come next.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

migrations/029_phone_directory.sql

@@ -0,0 +1,12 @@
+-- Phone book + phone directory nodes. NPCs gain contact details; a phone node's
+-- terminals each bind to an NPC (the callee) whose number the player dials.
+
+ALTER TABLE osint.npcs ADD COLUMN phone_number TEXT;
+ALTER TABLE osint.npcs ADD COLUMN email TEXT;
+
+ALTER TABLE osint.story_nodes DROP CONSTRAINT story_nodes_node_type_check;
+ALTER TABLE osint.story_nodes ADD CONSTRAINT story_nodes_node_type_check
+  CHECK (node_type IN ('cutscene','dialogue','level','det_gate','llm_gate','merit','phone'));
+
+-- A terminal on a phone node binds to the NPC you reach by dialing their number.
+ALTER TABLE osint.story_node_terminals ADD COLUMN npc_id UUID REFERENCES osint.npcs(id) ON DELETE SET NULL;