feat: add request ID propagation from Rust to Bun with structured logging

- Forward x-request-id header through proxy and API calls
- Store RequestId in request extensions for downstream access
- Add AsyncLocalStorage context to correlate logs across async boundaries
- Improve migration logging to show pending changes before applying
- Reduce noise in logs (common OG images, health checks)

web/entrypoint.ts

@@ -6,13 +6,20 @@ const API_SOCKET = "/tmp/api.sock";
 const PORT = process.env.PORT || "8080";
 const LOG_JSON = process.env.LOG_JSON || "true";
 
+function tryUnlink(path: string) {
+  try {
+    unlinkSync(path);
+  } catch (e) {
+    // ENOENT is expected (socket doesn't exist yet), other errors are unexpected
+    if (e instanceof Error && "code" in e && e.code !== "ENOENT") {
+      console.error(`Failed to cleanup ${path}: ${e.message}`);
+    }
+  }
+}
+
 function cleanup() {
-  try {
-    unlinkSync(BUN_SOCKET);
-  } catch {}
-  try {
-    unlinkSync(API_SOCKET);
-  } catch {}
+  tryUnlink(BUN_SOCKET);
+  tryUnlink(API_SOCKET);
 }
 
 // Cleanup on signals

web/src/hooks.server.ts

@@ -1,6 +1,7 @@
 import type { Handle, HandleServerError } from "@sveltejs/kit";
 import { dev } from "$app/environment";
 import { initLogger } from "$lib/logger";
+import { requestContext } from "$lib/server/context";
 import { preCacheCollections } from "$lib/server/icons";
 import { getLogger } from "@logtape/logtape";
 import { minify } from "html-minifier-terser";
@@ -13,6 +14,18 @@ await preCacheCollections();
 const logger = getLogger(["ssr", "error"]);
 
 export const handle: Handle = async ({ event, resolve }) => {
+  // Extract request ID from Rust proxy (should always be present in production)
+  const requestId = event.request.headers.get("x-request-id");
+  if (!requestId) {
+    const reqLogger = getLogger(["ssr", "request"]);
+    reqLogger.warn(
+      "Missing x-request-id header - request not routed through Rust proxy",
+      {
+        path: event.url.pathname,
+      },
+    );
+  }
+
   if (
     dev &&
     event.url.pathname === "/.well-known/appspecific/com.chrome.devtools.json"
@@ -20,31 +33,33 @@ export const handle: Handle = async ({ event, resolve }) => {
     return new Response(undefined, { status: 404 });
   }
 
-  const response = await resolve(event, {
-    transformPageChunk: !dev
-      ? ({ html }) =>
-          minify(html, {
-            collapseBooleanAttributes: true,
-            collapseWhitespace: true,
-            conservativeCollapse: true,
-            decodeEntities: true,
-            html5: true,
-            ignoreCustomComments: [/^\[/],
-            minifyCSS: true,
-            minifyJS: true,
-            removeAttributeQuotes: true,
-            removeComments: true,
-            removeOptionalTags: true,
-            removeRedundantAttributes: true,
-            removeScriptTypeAttributes: true,
-            removeStyleLinkTypeAttributes: true,
-            sortAttributes: true,
-            sortClassName: true,
-          })
-      : undefined,
-  });
+  return requestContext.run({ requestId: requestId ?? undefined }, async () => {
+    const response = await resolve(event, {
+      transformPageChunk: !dev
+        ? ({ html }) =>
+            minify(html, {
+              collapseBooleanAttributes: true,
+              collapseWhitespace: true,
+              conservativeCollapse: true,
+              decodeEntities: true,
+              html5: true,
+              ignoreCustomComments: [/^\[/],
+              minifyCSS: true,
+              minifyJS: true,
+              removeAttributeQuotes: true,
+              removeComments: true,
+              removeOptionalTags: true,
+              removeRedundantAttributes: true,
+              removeScriptTypeAttributes: true,
+              removeStyleLinkTypeAttributes: true,
+              sortAttributes: true,
+              sortClassName: true,
+            })
+        : undefined,
+    });
 
-  return response;
+    return response;
+  });
 };
 
 export const handleError: HandleServerError = async ({

web/src/lib/api.server.ts

@@ -1,5 +1,6 @@
 import { getLogger } from "@logtape/logtape";
 import { env } from "$env/dynamic/private";
+import { requestContext } from "$lib/server/context";
 
 const logger = getLogger(["ssr", "lib", "api"]);
 
@@ -39,6 +40,15 @@ function createSmartFetch(upstreamUrl: string) {
     // Remove custom fetch property from options (not part of standard RequestInit)
     delete (fetchOptions as Record<string, unknown>).fetch;
 
+    // Forward request ID to Rust API
+    const ctx = requestContext.getStore();
+    if (ctx?.requestId) {
+      fetchOptions.headers = {
+        ...fetchOptions.headers,
+        "x-request-id": ctx.requestId,
+      };
+    }
+
     // Add Unix socket path if needed
     if (isUnixSocket) {
       fetchOptions.unix = upstreamUrl;

web/src/lib/components/DiscordProfileModal.svelte

@@ -122,7 +122,10 @@
           </h2>
           <!-- USERNAME ROW: gap-1.5 controls spacing between elements -->
           <div class="flex items-center gap-1.5 text-sm">
-            <span class="font-mono text-xs px-1.5 py-0.5 rounded border border-zinc-300 dark:border-zinc-700 bg-zinc-200/50 dark:bg-zinc-800/50 text-zinc-600 dark:text-zinc-400">{username}</span>
+            <span
+              class="font-mono text-xs px-1.5 py-0.5 rounded border border-zinc-300 dark:border-zinc-700 bg-zinc-200/50 dark:bg-zinc-800/50 text-zinc-600 dark:text-zinc-400"
+              >{username}</span
+            >
             <button
               onclick={copyUsername}
               class="p-0.5 rounded hover:bg-zinc-200 dark:hover:bg-zinc-800 transition-colors"

web/src/lib/logger.ts

@@ -1,5 +1,6 @@
 import { dev } from "$app/environment";
 import { configure, getConsoleSink, type LogRecord } from "@logtape/logtape";
+import { requestContext } from "$lib/server/context";
 
 interface RailwayLogEntry {
   timestamp: string;
@@ -10,12 +11,14 @@ interface RailwayLogEntry {
 }
 
 function railwayFormatter(record: LogRecord): string {
+  const ctx = requestContext.getStore();
   const categoryTarget = record.category.join(":");
   const entry: RailwayLogEntry = {
     timestamp: new Date().toISOString(),
     level: record.level.toLowerCase(),
     message: record.message.join(" "),
     target: categoryTarget ? `bun:${categoryTarget}` : "bun",
+    ...(ctx?.requestId && { req_id: ctx.requestId }),
   };
 
   if (record.properties && Object.keys(record.properties).length > 0) {

web/src/lib/server/context.ts

@@ -0,0 +1,7 @@
+import { AsyncLocalStorage } from "node:async_hooks";
+
+export interface RequestContext {
+  requestId?: string;
+}
+
+export const requestContext = new AsyncLocalStorage<RequestContext>();

web/vite-plugin-json-logger.ts

@@ -29,6 +29,9 @@ function stripAnsi(str: string): string {
   return str.replace(/\u001b\[[0-9;]*m/g, "").trim();
 }
 
+// Module-level flag to prevent reconfiguration across plugin instantiations
+let loggerConfigured = false;
+
 export function jsonLogger(): Plugin {
   const useJsonLogs =
     process.env.LOG_JSON === "true" || process.env.LOG_JSON === "1";
@@ -39,7 +42,6 @@ export function jsonLogger(): Plugin {
     };
   }
 
-  let loggerConfigured = false;
   const configureLogger = async () => {
     if (loggerConfigured) return;
     await configure({