fix: remove @sofa/core and @sofa/api deps from public-api to fix Vercel runtime compatibility

- Drop `@sofa/core` and `@sofa/api` from `apps/public-api` — importing workspace packages with DB/Node dependencies broke the Vercel edge runtime
- `fetchUserData` on Trakt and Simkl importers now returns raw `unknown` API responses; parsing is deferred to the self-hosted server
- Add `source` + `rawPayload` fields to `ParsePayloadInput`; `parsePayload` procedure now dispatches to `parseTraktPayload`/`parseSimklPayload` and returns full warnings + diagnostics
- Export `ProviderEnum` from `apps/public-api/src/importers/index.ts` instead of defining it inline in `app.ts`

packages/api/src/contract.ts

@@ -749,9 +749,9 @@ export const contract = {
         method: "POST",
         path: "/imports/parse-payload",
         tags: ["Imports"],
-        summary: "Preview normalized import data",
+        summary: "Parse raw OAuth import data",
         description:
-          "Accept pre-normalized import data from the OAuth proxy and return a preview with item counts. No parsing is needed — data is already in NormalizedImport format.",
+          "Accept raw API responses from the OAuth proxy, parse them into normalized import format, and return a preview with item counts.",
         successDescription: "Preview of importable items with counts",
       })
       .input(ParsePayloadInput)

packages/api/src/schemas.ts

@@ -1048,7 +1048,8 @@ export const ParseFileInput = z.object({
 });
 
 export const ParsePayloadInput = z.object({
-  data: NormalizedImportSchema,
+  source: z.enum(["trakt", "simkl"]).describe("OAuth import provider"),
+  rawPayload: z.unknown().describe("Raw aggregated API response from the OAuth proxy"),
 });
 
 export const ImportJobStatusEnum = z.enum(["pending", "running", "success", "error", "cancelled"]);