fix(videos): fan out posts that self-heal to READY via polling

getByPostId's self-heal path (client polls while PROCESSING, checks
Mux directly) set status/muxPlaybackId on READY but never called
fanOutPost, unlike the mux webhook handler's video.asset.ready case.
Videos that self-healed this way played fine but never entered any
pet's feed. Found via a live upload test after the replica rollout.

src/trpc/routers/videos.ts

@@ -4,6 +4,8 @@ import { TRPCError } from "@trpc/server";
 import { router, protectedProcedure } from "@/trpc/init";
 import { mux } from "@/lib/mux";
 import { assertPetOwnership } from "@/lib/assert-pet-ownership";
+import { redis } from "@/lib/redis";
+import { fanOutPost } from "@/lib/feed-helpers";
 
 const MAX_VIDEO_DURATION_SECS = 180; // 3 min hard cap — Mux rejects longer via passthrough check
 
@@ -80,6 +82,7 @@ export const videosRouter = router({
     .query(async ({ ctx, input }) => {
       const videoPost = await ctx.prisma.videoPost.findUnique({
         where: { postId: input.postId },
+        include: { post: { select: { petId: true, createdAt: true } } },
       });
       if (!videoPost) throw new TRPCError({ code: "NOT_FOUND" });
 
@@ -95,7 +98,7 @@ export const videosRouter = router({
           if (assetId) {
             const asset = await mux.video.assets.retrieve(assetId);
             if (asset.status === "ready" && asset.playback_ids?.[0]) {
-              return await ctx.prisma.videoPost.update({
+              const updated = await ctx.prisma.videoPost.update({
                 where: { postId: input.postId },
                 data: {
                   status: "READY",
@@ -105,6 +108,19 @@ export const videosRouter = router({
                   aspectRatio: asset.aspect_ratio ?? null,
                 },
               });
+              // Mirrors the mux/route.ts webhook handler's fan-out on
+              // video.asset.ready — without this, a video that self-heals
+              // here (webhook delayed or unreachable) never enters any
+              // pet's feed even though it plays fine. zadd is idempotent,
+              // so this is safe to run again if the real webhook also lands.
+              await fanOutPost(
+                redis,
+                input.postId,
+                videoPost.post.petId,
+                videoPost.post.createdAt,
+                ctx.prisma
+              ).catch((err) => console.error("[videos.getByPostId] fanOutPost failed", err));
+              return updated;
             } else if (asset.status === "errored") {
               return await ctx.prisma.videoPost.update({
                 where: { postId: input.postId },