feat: add AI tool capability permissions and secret masking to CASL layer

Extends AbilityFactory with a risk-stratified capability model for Hermes
MCP tools (economic-data/capability-reasoning/legislation-search), ported
from Open.Jarvis's plugin permission system: non-owner/admin roles only
get low/medium risk tools by default, high/critical stay reserved. Adds
maskSensitiveValue as a reusable secret/PII redaction utility for future
outbox/audit logging, reinforcing the existing ai_requests hash-only
storage principle.

src/auth/ability.factory.ts

@@ -1,9 +1,33 @@
 import { Injectable } from '@nestjs/common';
-import { AbilityBuilder, PureAbility, type AbilityClass } from '@casl/ability';
+import { AbilityBuilder, createMongoAbility, subject, type ForcedSubject, type MongoAbility } from '@casl/ability';
 
-export type Action = 'manage' | 'create' | 'read' | 'update' | 'delete';
-export type Subject = 'Organization' | 'Transaction' | 'Document' | 'Membership' | 'all';
-export type AppAbility = PureAbility<[Action, Subject]>;
+/**
+ * Nivel de risc pentru unelte AI/agenti (Hermes MCP), portat din modelul de
+ * capabilitati risk-stratified al Open.Jarvis (github.com/dmrr35/Open.Jarvis,
+ * open_jarvis/plugins/permissions.py) -- roluri non-admin primesc implicit
+ * doar unelte low/medium, high/critical raman rezervate owner/admin.
+ */
+export type AgentToolRiskLevel = 'low' | 'medium' | 'high' | 'critical';
+
+export interface AgentToolDefinition {
+  name: string;
+  riskLevel: AgentToolRiskLevel;
+  description: string;
+}
+
+/** Forma exacta produsa de `subject('AgentTool', toolDefinition)` -- vezi canInvokeAgentTool. */
+type AgentToolInstance = AgentToolDefinition & ForcedSubject<'AgentTool'>;
+
+export type Action = 'manage' | 'create' | 'read' | 'update' | 'delete' | 'invoke';
+export type Subject =
+  | 'Organization'
+  | 'Transaction'
+  | 'Document'
+  | 'Membership'
+  | 'AgentTool'
+  | AgentToolInstance
+  | 'all';
+export type AppAbility = MongoAbility<[Action, Subject]>;
 export type MembershipRole = 'owner' | 'admin' | 'member';
 
 export interface MembershipContext {
@@ -11,6 +35,31 @@ export interface MembershipContext {
   role: MembershipRole;
 }
 
+/**
+ * Registrul uneltelor AI expuse prin Hermes (namespace MetaMCP 'ceo-os-endpoint').
+ * `name` trebuie sa corespunda exact numelui serverului MCP raportat de
+ * `hermes mcp test` -- vezi project_supersrv_new_server.md pentru lista live.
+ */
+export const AGENT_TOOL_REGISTRY: readonly AgentToolDefinition[] = [
+  {
+    name: 'economic-data',
+    riskLevel: 'low',
+    description: 'World Bank/ECB/Eurostat/FRED/OECD, stiri, IP/domeniu lookups',
+  },
+  {
+    name: 'capability-reasoning',
+    riskLevel: 'low',
+    description: 'Potrivire ocupatii/skill-uri ESCO pentru "ce poate/nu poate face agentul"',
+  },
+  {
+    name: 'legislation-search',
+    riskLevel: 'medium',
+    description: 'Cautare semantica in legislatia UK/DE/RO -- informativ, nu consultanta juridica',
+  },
+];
+
+const DEFAULT_ROLE_INVOKABLE_RISK_LEVELS: readonly AgentToolRiskLevel[] = ['low', 'medium'];
+
 /**
  * Traduce rolul de membership (blueprint 8.3: memberships.role) intr-un set de
  * permisiuni CASL. Regulile sunt intentionat minimale -- se extind per bounded
@@ -19,15 +68,30 @@ export interface MembershipContext {
 @Injectable()
 export class AbilityFactory {
   createForMembership(membership: MembershipContext): AppAbility {
-    const { can, build } = new AbilityBuilder<AppAbility>(PureAbility as AbilityClass<AppAbility>);
+    const { can, build } = new AbilityBuilder<AppAbility>(createMongoAbility);
 
     if (membership.role === 'owner' || membership.role === 'admin') {
       can('manage', 'all');
     } else {
       can('read', 'all');
       can(['create', 'update'], ['Transaction', 'Document']);
+      can('invoke', 'AgentTool', { riskLevel: { $in: [...DEFAULT_ROLE_INVOKABLE_RISK_LEVELS] } });
     }
 
     return build();
   }
 }
+
+/**
+ * Verifica daca o abilitate poate invoca o unealta AI dupa nume. Nume necunoscute
+ * (absente din AGENT_TOOL_REGISTRY) sunt respinse implicit -- acelasi deny-by-default
+ * ca `require_plugin_permission()` din Open.Jarvis.
+ */
+export function canInvokeAgentTool(ability: AppAbility, toolName: string): boolean {
+  const toolDefinition = AGENT_TOOL_REGISTRY.find((tool) => tool.name === toolName);
+  if (!toolDefinition) {
+    return false;
+  }
+
+  return ability.can('invoke', subject('AgentTool', toolDefinition));
+}

src/security/mask-sensitive.ts

@@ -0,0 +1,41 @@
+const MASK = '***';
+
+const SENSITIVE_KEY_PATTERN = /(key|token|secret|password)/i;
+const ASSIGNMENT_PATTERN = /([A-Z0-9_]*(?:KEY|TOKEN|SECRET|PASSWORD)[A-Z0-9_]*)=(\S+)/gi;
+
+/**
+ * Masking de secrete/PII portat din Open.Jarvis (github.com/dmrr35/Open.Jarvis,
+ * open_jarvis/memory/privacy_mode.py) -- aplicat inainte de orice scriere in
+ * outbox_events.payload / audit_log, ca strat suplimentar fata de principiul
+ * deja aplicat in ai_requests (se stocheaza doar context_manifest_hash, niciodata
+ * continutul brut).
+ */
+export function maskSensitiveValue(value: unknown, key?: string): unknown {
+  if (key !== undefined && SENSITIVE_KEY_PATTERN.test(key)) {
+    return MASK;
+  }
+
+  if (typeof value === 'string') {
+    return value.replace(ASSIGNMENT_PATTERN, (_match, name: string) => `${name}=${MASK}`);
+  }
+
+  if (Array.isArray(value)) {
+    return value.map((item) => maskSensitiveValue(item));
+  }
+
+  if (value !== null && typeof value === 'object') {
+    return maskSensitiveObject(value as Record<string, unknown>);
+  }
+
+  return value;
+}
+
+function maskSensitiveObject(input: Record<string, unknown>): Record<string, unknown> {
+  const masked: Record<string, unknown> = {};
+
+  for (const [key, value] of Object.entries(input)) {
+    masked[key] = maskSensitiveValue(value, key);
+  }
+
+  return masked;
+}