Merge CB-561: one public way to build a CallerResolver (PR #32)

CallerResolver had 5 public constructors and 4 public factories, and only one
of them could ever produce an architect. The rest defaulted memberSlotRoles to
`_ -> null`, so every architect quietly fell through to Principal.worker().
Nothing logged, nothing threw — the role was simply off.

That is the same failure shape as CB-560, so the fix is structural rather than
a warning: withLeadsAndMembers(.., MemberRegistry) is now the only public
construction path. Two overloads with no caller at all are deleted; the rest
are package-private and marked test-only. No path remains that accepts
architect bindings without a slot-role lookup, so no runtime WARN is needed.

Also checked and closed: the suspected slot leak on shutdown drain is not
real. SessionManager.release calls memberLifecycle.released() for every
removed session, and drainAll routes every session through release,
SPAWNING included. Verified in code.

bridged/src/test/java/dev/ltms/bridged/auth/CallerResolverTest.java

@@ -315,6 +315,7 @@ class CallerResolverTest {
 
     @Test
     void aBoundArchitectPaneResolvesToArchitectBeforeTheWorkerFallback() {
+        // This is the production construction path used by Bridged.
         Principal p = CallerResolver.withLeadsAndMembers(workerIdentity(), false, null,
                 Map::of, boundMembers("architect:lead-designer", MemberRole.ARCHITECT))
                 .resolve("127.0.0.1", 42, null);
@@ -338,9 +339,10 @@ class CallerResolverTest {
 
     @Test
     void anUnboundPaneStillResolvesAsAWorker() {
-        Map<String, String> arch = Map.of("term_elsewhere", "reviewer");
+        MemberRegistry members = new MemberRegistry(new BridgedConfig.Fleet(Map.of(),
+                Map.of("lead-designer", new BridgedConfig.Slot("sonnet")), Map.of(), Map.of(), null));
         Principal p = CallerResolver.withLeadsAndMembers(workerIdentity(), false, null,
-                Map::of, () -> arch).resolve("127.0.0.1", 42, null);
+                Map::of, members).resolve("127.0.0.1", 42, null);
 
         assertEquals(Role.WORKER, p.role());
         assertNull(p.name());
@@ -376,16 +378,6 @@ class CallerResolverTest {
         assertEquals("architect:lead-designer", r.members().get("term_a"));
     }
 
-    @Test
-    void theArchitectMapFormIsCopiedSoLaterMutationCannotGrantArchitect() {
-        Map<String, String> mutable = new java.util.LinkedHashMap<>();
-        CallerResolver r = new CallerResolver(workerIdentity(), false, null, Map.of(), mutable);
-
-        mutable.put("term_a", "sneaky");
-
-        assertEquals(Role.WORKER, r.resolve("127.0.0.1", 42, null).role());
-    }
-
     @Test
     void describeNamesTheArchitectSlot() {
         assertEquals("architect:lead-designer",

bridged/src/test/java/dev/ltms/bridged/mcp/BridgeMcpAuthzTest.java

@@ -2,6 +2,7 @@ package dev.ltms.bridged.mcp;
 
 import dev.ltms.bridged.auth.Authz;
 import dev.ltms.bridged.auth.CallerResolver;
+import dev.ltms.bridged.auth.MemberRegistry;
 import dev.ltms.bridged.auth.Principal;
 import dev.ltms.bridged.auth.Role;
 import dev.ltms.bridged.config.BridgedConfig;
@@ -69,7 +70,8 @@ class BridgeMcpAuthzTest {
 
         mcp = new BridgeMcp(messages, workers, sessions, identity, sessions.asPresence(),
                 new PrimaryRegistry(null),
-                enforce ? new CallerResolver(identity) : null,
+                enforce ? CallerResolver.withLeadsAndMembers(identity, false, null,
+                Map::of, new MemberRegistry(null)) : null,
                 metrics);
         return mcp;
     }

bridged/src/test/java/dev/ltms/bridged/rest/BridgedAppAuthTest.java

@@ -1,6 +1,7 @@
 package dev.ltms.bridged.rest;
 
 import dev.ltms.bridged.auth.CallerResolver;
+import dev.ltms.bridged.auth.MemberRegistry;
 import dev.ltms.bridged.config.BridgedConfig;
 import dev.ltms.bridged.guard.SubscriptionGuard;
 import dev.ltms.bridged.herdr.AgentControl;
@@ -65,9 +66,8 @@ class BridgedAppAuthTest {
         MessageService messages = new MessageService(agents, injector, new Rendezvous());
 
         ConnectionIdentity identity = new ConnectionIdentity(new PaneLocator(herdr), _ -> pid);
-        CallerResolver callers = tokenMode
-                ? new CallerResolver(identity, true, token)
-                : new CallerResolver(identity);
+        CallerResolver callers = CallerResolver.withLeadsAndMembers(identity, tokenMode, token,
+                Map::of, new MemberRegistry(null));
         metrics = BridgedMetrics.create(sessions, new dev.ltms.bridged.msg.InMemoryReplyInbox());
 
         app = new BridgedApp(herdr, workers, sessions, messages, sessions.asPresence(), null,