feat: add Model Registry feature with catalog pipeline, dashboard pages, and TSQL schema

- Add llm-model-catalog package (renamed from llm-pricing) with Claude CLI research pipeline
- Add Prisma schema: catalog columns + baseModelName on LlmModel
- Add ClickHouse: llm_model_aggregates MV + base_response_model column
- Add TSQL llm_models schema for query page integration
- Add ModelRegistryPresenter with catalog, metrics, and comparison queries
- Add 3 dashboard pages: catalog (cards+table+filters), detail (overview+metrics+cost estimator), compare
- Add sidebar navigation under AI section with hasAiAccess feature flag
- Add admin dashboard sync/seed for catalog metadata
- Add model variant grouping (dated snapshots under base models)
- Add shared formatters and design system component usage

refs TRI-7941

Author: ericallam

apps/webapp/app/components/navigation/SideMenu.tsx

@@ -10,6 +10,7 @@ import {
   ClockIcon,
   Cog8ToothIcon,
   CogIcon,
+  CubeIcon,
   ExclamationTriangleIcon,
   PuzzlePieceIcon,
   FolderIcon,
@@ -78,6 +79,7 @@ import {
   v3LogsPath,
   v3ErrorsPath,
   v3PromptsPath,
+  v3ModelsPath,
   v3ProjectAlertsPath,
   v3ProjectPath,
   v3ProjectSettingsGeneralPath,
@@ -457,35 +459,46 @@ export function SideMenu({
               />
             </div>
 
-            <SideMenuSection
-              title="AI"
-              isSideMenuCollapsed={isCollapsed}
-              itemSpacingClassName="space-y-0"
-              initialCollapsed={getSectionCollapsed(
-                user.dashboardPreferences.sideMenu,
-                "ai"
-              )}
-              onCollapseToggle={handleSectionToggle("ai")}
-            >
-              <SideMenuItem
-                name="Prompts"
-                icon={DocumentTextIcon}
-                activeIconColor="text-purple-500"
-                inactiveIconColor="text-purple-500"
-                to={v3PromptsPath(organization, project, environment)}
-                data-action="prompts"
-                isCollapsed={isCollapsed}
-              />
-              <SideMenuItem
-                name="AI Metrics"
-                icon={SparklesIcon}
-                activeIconColor="text-purple-500"
-                inactiveIconColor="text-purple-500"
-                to={v3BuiltInDashboardPath(organization, project, environment, "llm")}
-                data-action="ai-metrics"
-                isCollapsed={isCollapsed}
-              />
-            </SideMenuSection>
+            {(user.admin || user.isImpersonating || featureFlags.hasAiAccess) && (
+              <SideMenuSection
+                title="AI"
+                isSideMenuCollapsed={isCollapsed}
+                itemSpacingClassName="space-y-0"
+                initialCollapsed={getSectionCollapsed(
+                  user.dashboardPreferences.sideMenu,
+                  "ai"
+                )}
+                onCollapseToggle={handleSectionToggle("ai")}
+              >
+                <SideMenuItem
+                  name="Prompts"
+                  icon={DocumentTextIcon}
+                  activeIconColor="text-purple-500"
+                  inactiveIconColor="text-purple-500"
+                  to={v3PromptsPath(organization, project, environment)}
+                  data-action="prompts"
+                  isCollapsed={isCollapsed}
+                />
+                <SideMenuItem
+                  name="Models"
+                  icon={CubeIcon}
+                  activeIconColor="text-purple-500"
+                  inactiveIconColor="text-purple-500"
+                  to={v3ModelsPath(organization, project, environment)}
+                  data-action="models"
+                  isCollapsed={isCollapsed}
+                />
+                <SideMenuItem
+                  name="AI Metrics"
+                  icon={SparklesIcon}
+                  activeIconColor="text-purple-500"
+                  inactiveIconColor="text-purple-500"
+                  to={v3BuiltInDashboardPath(organization, project, environment, "llm")}
+                  data-action="ai-metrics"
+                  isCollapsed={isCollapsed}
+                />
+              </SideMenuSection>
+            )}
 
             {(user.admin || user.isImpersonating || featureFlags.hasQueryAccess) && (
               <SideMenuSection

apps/webapp/app/env.server.ts

@@ -1222,6 +1222,9 @@ const EnvironmentSchema = z
     // Query feature flag
     QUERY_FEATURE_ENABLED: z.string().default("1"),
 
+    // AI features (Prompts, Models, AI Metrics sidebar section)
+    AI_FEATURES_ENABLED: z.string().default("0"),
+
     // Logs page ClickHouse URL (for logs queries)
     LOGS_CLICKHOUSE_URL: z
       .string()