Merge upstream/dev into feature-response-headers

Resolve conflicts against upstream's refactors:

- server/db/sqlite/schema/schema.ts: adopt upstream's reindented
  sqliteTable(name, cols, indexes) form for sites/resources, re-applying
  the headers -> requestHeaders/responseHeaders split. Kept in sync with
  the Postgres schema.
- server/lib/traefik/headersMiddleware.ts: extend upstream's extracted
  buildCustomHeadersMiddleware helper to take requestHeaders and
  responseHeaders and emit both customRequestHeaders and
  customResponseHeaders.
- server/lib/traefik/getTraefikConfig.ts and
  server/private/lib/traefik/getTraefikConfig.ts: keep upstream's helper
  extraction and appendPathMatch refactor, dropping the superseded inline
  blocks.

Also carry the feature forward onto code that moved upstream:

- The resource settings UI moved from resources/proxy/[niceId]/proxy to
  resources/public/[niceId]/http, which dropped this branch's changes in
  the previous merge. Re-add the request/response header inputs there and
  rename the vestigial headers field on the tcp page.
- messages/da-DK.json is new upstream and still had the old customHeaders
  key; rename it in line with the other locales.

Per the contributing docs, versioned migrations are intentionally omitted
so maintainers can write them at release time.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

server/routers/resource/getResource.ts

@@ -64,7 +64,7 @@ registry.registerPath({
     path: "/org/{orgId}/resource/{niceId}",
     description:
         "Get a resource by orgId and niceId. NiceId is a readable ID for the resource and unique on a per org basis.",
-    tags: [OpenAPITags.PublicResource],
+    tags: [OpenAPITags.PublicResourceLegacy],
     request: {
         params: z.object({
             orgId: z.string(),
@@ -93,6 +93,34 @@ registry.registerPath({
     method: "get",
     path: "/resource/{resourceId}",
     description: "Get a resource by resourceId.",
+    tags: [OpenAPITags.PublicResourceLegacy],
+    request: {
+        params: z.object({
+            resourceId: z.number()
+        })
+    },
+    responses: {
+        200: {
+            description: "Successful response",
+            content: {
+                "application/json": {
+                    schema: z.object({
+                        data: z.record(z.string(), z.any()).nullable(),
+                        success: z.boolean(),
+                        error: z.boolean(),
+                        message: z.string(),
+                        status: z.number()
+                    })
+                }
+            }
+        }
+    }
+});
+
+registry.registerPath({
+    method: "get",
+    path: "/public-resource/{resourceId}",
+    description: "Get a resource by resourceId.",
     tags: [OpenAPITags.PublicResource],
     request: {
         params: z.object({