Remove final AppDatabase pass-through methods with ESLint guard (C1 part 3/3)

Migrate all remaining pass-through call sites (social, skills, budget,
entityCrud, documents, knowledge, automation, wakeup, backup, threads,
settings, snapshot, connectors, workspaces, activity) to their owning
domain modules. `AppDatabase` now carries only three methods:

  - createHireRequest (multi-module composite: agents + approvalsMod)
  - rollbackConfigRevision (multi-module composite: documents + entityCrud)
  - queryAll (raw-SQL escape hatch, @internal)

The vault/env-binding infrastructure previously passed argument-by-
argument into `entityCrud.saveSecret`/`resolveSecretEnv` now binds at
module construction, letting callers invoke `db.entityCrud.saveSecret({...})`
without carrying vault plumbing.

Structural types that narrowed AppDatabase to a bag of flat methods
(`ConnectorModelPolicyDeps` callers, `CapabilityMatchDb`, test mocks in
budget-enforcement / budget-incidents / task-quality-gates /
failure-escalation / task-quality-gates-sweep) are reshaped to the new
namespace. `connectorPolicyDepsFromDb` replaces the old pattern of
handing the whole AppDatabase to `validateConnectorModelSelection`.

A new ESLint rule in eslint.config.mjs blocks new top-level methods on
AppDatabase so the pass-through layer cannot silently grow back.
`AppDatabase.ts` dropped from 193 lines to 58; `AppDatabaseBase` lost
the 270-line trailing pass-through block.

src/main/api-server/routes-messages.ts

@@ -26,7 +26,7 @@ export function registerMessageRoutes(server: AgentApiServer) {
         return;
       }
       const agent = db.entityCrud.getAgent(token.agentId);
-      const comment = db.addComment({
+      const comment = db.activityMod.addComment({
         companyId: task.companyId,
         taskId: task.id,
         authorAgentId: token.agentId,
@@ -78,7 +78,7 @@ export function registerMessageRoutes(server: AgentApiServer) {
       server.json(res, 404, { error: "Task not found" });
       return;
     }
-    const comments = db.listComments(requireParam(params, "issueId"));
+    const comments = db.activityMod.listComments(requireParam(params, "issueId"));
     server.json(res, 200, comments);
   });