feat: eager vLLM warmup and smart page titles in paginate stage

- Add warmup() to LlmProvider interface for eager subprocess startup
- ManagedVllmProvider.warmup() starts vLLM in background on project load
- ProviderRegistry.warmupAll() triggers all managed providers
- NamedProvider proxies warmup() to inner provider
- paginate stage generates LLM-powered descriptive page titles when
  available, cached by content hash, falls back to generic "Page N"
- project-mcp-endpoint calls warmupAll() on router creation so vLLM
  is loading while the session initializes

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/db/prisma/migrations/20260227180000_add_runtime_field/migration.sql

@@ -0,0 +1,5 @@
+-- AlterTable
+ALTER TABLE "McpServer" ADD COLUMN "runtime" TEXT;
+
+-- AlterTable
+ALTER TABLE "McpTemplate" ADD COLUMN "runtime" TEXT;

src/db/prisma/migrations/20260228120000_add_proxymodel_to_project/migration.sql

@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "Project" ADD COLUMN "proxyModel" TEXT NOT NULL DEFAULT '';

src/db/prisma/migrations/20260301120000_add_audit_events_and_server_overrides/migration.sql

@@ -0,0 +1,27 @@
+-- CreateTable
+CREATE TABLE "AuditEvent" (
+    "id" TEXT NOT NULL,
+    "timestamp" TIMESTAMP(3) NOT NULL,
+    "sessionId" TEXT NOT NULL,
+    "projectName" TEXT NOT NULL,
+    "eventKind" TEXT NOT NULL,
+    "source" TEXT NOT NULL,
+    "verified" BOOLEAN NOT NULL DEFAULT false,
+    "serverName" TEXT,
+    "correlationId" TEXT,
+    "parentEventId" TEXT,
+    "payload" JSONB NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "AuditEvent_pkey" PRIMARY KEY ("id")
+);
+
+-- AlterTable
+ALTER TABLE "Project" ADD COLUMN "serverOverrides" JSONB;
+
+-- CreateIndex
+CREATE INDEX "AuditEvent_sessionId_idx" ON "AuditEvent"("sessionId");
+CREATE INDEX "AuditEvent_projectName_idx" ON "AuditEvent"("projectName");
+CREATE INDEX "AuditEvent_correlationId_idx" ON "AuditEvent"("correlationId");
+CREATE INDEX "AuditEvent_timestamp_idx" ON "AuditEvent"("timestamp");
+CREATE INDEX "AuditEvent_eventKind_idx" ON "AuditEvent"("eventKind");