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.

tests/unit/edge-case-concurrent.test.ts

@@ -36,7 +36,7 @@ function createTestCompany(db: AppDatabase): string {
 }
 
 function createTestConnector(db: AppDatabase): void {
-  db.saveConnector({
+  db.connectorsCrud.saveConnector({
     id: "gemini-cli",
     model: "gemini-pro",
     envBindingText: "",
@@ -45,7 +45,7 @@ function createTestConnector(db: AppDatabase): void {
 }
 
 function createTestWorkspace(db: AppDatabase, companyId: string): string {
-  return db.saveWorkspace({
+  return db.workspacesMod.saveWorkspace({
     companyId,
     name: "Test Workspace",
     localPath: "/tmp/concurrent-test",