test(server): port core's UO suite onto the ctx harness

22 test files moved from core, plus the two that were split out of files core
keeps. 351 tests pass.

One change runs through every moved test, and it is the boundary rather than a
chore: core internals can no longer be stubbed by requiring them, because there
are none to require. `../utils/db` and `../model/settings` do not exist here.
What a test controls instead is the ctx core would have handed over, installed
once by test/_setup.js -- which is a better seam anyway, since it is exactly the
surface the contract promises and nothing wider.

The ctx _setup installs is deliberately unfrozen. Core freezes what it hands a
module and entry.test.js still asserts against a frozen one; but a test that
needs settings.get to return a path has to be able to say so.

Two tests changed SHAPE, and that is the boundary too. fromShardEvent used to
assert through publish() into pushDevices and a captured fetch -- which
endpoints were hit, how many requests went out. None of that is this module's
any more: publish is ctx.push.publish, and the device registry and the relay are
behind it. Reaching for them from here would be reaching past ctx. What remains
is what the module owns and is the part worth guarding: a game account resolves
to a website user, a personal target that resolves to nobody is dropped rather
than published, and a sensitive kind never reaches publish at all.

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

server/test/shardState.governorTerms.test.js

@@ -0,0 +1,77 @@
+const { test, beforeEach } = require('node:test')
+const assert = require('node:assert/strict')
+
+// Term capture lives in the model (shardState.model.upsertGovernor →
+// recordGovernorTransition) and talks to the db module. We exercise the real
+// logic against an in-memory fake by monkeypatching the shared db module object
+// (same instance the model require()s) — no DB, no mocking library.
+const db = require('../model/shardState/shardState.db')
+const model = require('../model/shardState/shardState.model')
+
+let terms // in-memory shard_governor_terms
+let nextId
+const saved = {}
+
+beforeEach(() => {
+  terms = []
+  nextId = 1
+  for (const k of ['currentGovernorTerm', 'closeGovernorTerm', 'openGovernorTerm', 'upsertGovernor']) {
+    saved[k] = db[k]
+  }
+  db.currentGovernorTerm = async (city) =>
+    terms.find((t) => t.city === city && t.ended_at === null) || null
+  db.closeGovernorTerm = async (id, endedAt) => {
+    const row = terms.find((t) => t.id === id)
+    if (row) row.ended_at = endedAt
+  }
+  db.openGovernorTerm = async ({ city, serial, name, acct, webId, startedAt }) => {
+    terms.push({ id: nextId++, city, governor_serial: serial, governor_name: name,
+      governor_acct: acct, governor_web_id: webId, started_at: startedAt, ended_at: null })
+  }
+  db.upsertGovernor = async () => {} // snapshot write — irrelevant to term capture
+})
+
+function restore() {
+  for (const k of Object.keys(saved)) db[k] = saved[k]
+}
+
+test('a repeated city.update with the same governor does NOT open a second term', async () => {
+  await model.upsertGovernor({ city: 'Britain', governor: { serial: '0x1', name: 'Darrow' }, t: 100 })
+  await model.upsertGovernor({ city: 'Britain', governor: { serial: '0x1', name: 'Darrow' }, t: 200 })
+  const open = terms.filter((t) => t.ended_at === null)
+  assert.equal(terms.length, 1)
+  assert.equal(open.length, 1)
+  assert.equal(open[0].governor_serial, '0x1')
+  assert.equal(open[0].started_at, 100)
+  restore()
+})
+
+test('a governor change closes the old term and opens a new one', async () => {
+  await model.upsertGovernor({ city: 'Britain', governor: { serial: '0x1', name: 'Darrow' }, t: 100 })
+  await model.upsertGovernor({ city: 'Britain', governor: { serial: '0x2', name: 'Mira' }, t: 300 })
+  assert.equal(terms.length, 2)
+  const [first, second] = terms
+  assert.equal(first.governor_serial, '0x1')
+  assert.equal(first.ended_at, 300) // closed at the transition time
+  assert.equal(second.governor_serial, '0x2')
+  assert.equal(second.ended_at, null) // now current
+  assert.equal(second.started_at, 300)
+  restore()
+})
+
+test('a seat going vacant closes the term without opening a new one', async () => {
+  await model.upsertGovernor({ city: 'Britain', governor: { serial: '0x1', name: 'Darrow' }, t: 100 })
+  await model.upsertGovernor({ city: 'Britain', governor: null, t: 400 })
+  assert.equal(terms.length, 1)
+  assert.equal(terms[0].ended_at, 400)
+  restore()
+})
+
+test('terms are tracked independently per city', async () => {
+  await model.upsertGovernor({ city: 'Britain', governor: { serial: '0x1' }, t: 100 })
+  await model.upsertGovernor({ city: 'Minoc', governor: { serial: '0x9' }, t: 120 })
+  await model.upsertGovernor({ city: 'Britain', governor: { serial: '0x1' }, t: 200 }) // dup, no-op
+  assert.equal(terms.length, 2)
+  assert.equal(terms.filter((t) => t.ended_at === null).length, 2)
+  restore()
+})