Revert "feat(request-details): implement observability settings and enhance request detail tracking"

This reverts commit cbabf5547c.

src/app/api/usage/providers/route.js

@@ -1,62 +0,0 @@
-import { NextResponse } from "next/server";
-import { getRequestDetailsDb } from "@/lib/requestDetailsDb";
-import { getProviderNodes } from "@/lib/localDb";
-import { AI_PROVIDERS, getProviderByAlias } from "@/shared/constants/providers";
-
-/**
- * GET /api/usage/providers
- * Returns list of unique providers from request details
- */
-export async function GET() {
-  try {
-    const db = await getRequestDetailsDb();
-
-    const stmt = db.prepare(`
-      SELECT DISTINCT provider
-      FROM request_details
-      WHERE provider IS NOT NULL AND provider != ''
-      ORDER BY provider ASC
-    `);
-
-    const rows = stmt.all();
-
-    // Fetch all provider nodes to get names for custom providers
-    const providerNodes = await getProviderNodes();
-    const nodeMap = {};
-    for (const node of providerNodes) {
-      nodeMap[node.id] = node.name;
-    }
-
-    const providers = rows.map(row => {
-      const providerId = row.provider;
-
-      // Try to find name from various sources
-      let name = providerId;
-
-      // 1. Check if it's a custom provider node
-      if (nodeMap[providerId]) {
-        name = nodeMap[providerId];
-      }
-      // 2. Check predefined providers
-      else {
-        const providerConfig = getProviderByAlias(providerId) || AI_PROVIDERS[providerId];
-        if (providerConfig?.name) {
-          name = providerConfig.name;
-        }
-      }
-
-      return {
-        id: providerId,
-        name
-      };
-    });
-
-    return NextResponse.json({ providers });
-  } catch (error) {
-    console.error("[API] Failed to get providers:", error);
-    return NextResponse.json(
-      { error: "Failed to fetch providers" },
-      { status: 500 }
-    );
-  }
-}