Fix type safety errors and test failures in data packet routes

Remove unsafe 'as any' type casts and send full error objects instead
of extracting message strings. This fixes ESLint warnings and aligns
with test expectations.

Author: ad-si

routes/dataPackets.ts

@@ -18,12 +18,10 @@ export function exists (request: Request, response: Response) {
       .then(resultId => response.status(200)
         .send(resultId))
       .catch((resultId: unknown) => {
-        const message = (resultId as any)?.message ?? String(resultId)
-        return response.status(404).send(message)
+        return response.status(404).send(resultId)
       }))
     .catch((error: unknown) => {
-      const message = (error as any)?.message ?? String(error)
-      return response.status(400).send(message)
+      return response.status(400).send(error)
     })
 }
 
@@ -34,28 +32,24 @@ export function get (request: Request, response: Response) {
       .then(packet => response.status(200)
         .json(packet))
       .catch((resultId: unknown) => {
-        const message = (resultId as any)?.message ?? String(resultId)
-        return response.status(404).send(message)
+        return response.status(404).send(resultId)
       }))
     .catch((error: unknown) => {
-      const message = (error as any)?.message ?? String(error)
-      return response.status(400).send(message)
+      return response.status(400).send(error)
     })
 }
 
 export function put (request: Request, response: Response) {
   const id = Array.isArray(request.params.id) ? request.params.id[0] : request.params.id
   return dpStorage.isSaneId(id)
-    .then(() => dpStorage.put({id, data: request.body})
+    .then(() => dpStorage.put({id, data: request.body as Record<string, unknown>})
       .then(() => response.status(200)
         .send(id))
       .catch((resultId: unknown) => {
-        const message = (resultId as any)?.message ?? String(resultId)
-        return response.status(404).send(message)
+        return response.status(404).send(resultId)
       }))
     .catch((error: unknown) => {
-      const message = (error as any)?.message ?? String(error)
-      return response.status(400).send(message)
+      return response.status(400).send(error)
     })
 }
 
@@ -66,12 +60,10 @@ export function delete_ (request: Request, response: Response) {
       .then(() => response.status(204)
         .send())
       .catch((resultId: unknown) => {
-        const message = (resultId as any)?.message ?? String(resultId)
-        return response.status(404).send(message)
+        return response.status(404).send(resultId)
       }))
     .catch((error: unknown) => {
-      const message = (error as any)?.message ?? String(error)
-      return response.status(400).send(message)
+      return response.status(400).send(error)
     })
 }