Watch pages: chapters, comments, chat replay, the playlist form and up next are asked together, not one after another (/v/:id p95 581 ms) (#95)

ddiff --git a/server/video/pages.js b/server/video/pages.js
iindex fa53fdf..d863a03 100644
---- a/server/video/pages.js
++++ b/server/video/pages.js
@@@ -755,27 +755,34 @@ ${uploaded.length ? html`<section class="ovv-section" aria-labelledby="h-uploads
          const clips = Array.isArray(data.clips) ? data.clips.filter((c) => c && c.visibility !== 'private') : [];
  
          const segs = transcriptSegments(vod);
++        // Chapters, comments, chat replay, the playlist form and up next do not depend on each other: asked together
++        // (one after another, five services' answers in turn, the page's p95 was 581 ms on 2026-10-17).
++        const fail = Symbol('failed');
++        const [m, cm, replay, saveForm, up] = await Promise.all([
++            Promise.resolve().then(() => live.vodMemories(id)).catch(() => fail),
++            Promise.resolve().then(() => live.comments('vod', id)).catch(() => fail),
++            Promise.resolve().then(() => chat.chatReplay(vod.stream_id)).catch(() => fail),
++            playlistForm(req, 'vod', id),
++            upNext(req, 'vod', id),
++        ]);
          let mems = [];
--        try {
--            const m = await live.vodMemories(id);
--            mems = chapters(moments(m && m.memories), vod.duration_seconds);
--        } catch { mems = []; }
++        try { if (m !== fail) mems = chapters(moments(m && m.memories), vod.duration_seconds); } catch { mems = []; }
          let threadUrl = null;
          let commentRows = [];
          let commentsOk = false;
--        try {
--            const cm = await live.comments('vod', id);
--            threadUrl = httpsUrl(cm && cm.thread && cm.thread.url);
--            const list = Array.isArray(cm && cm.comments) ? cm.comments : [];
--            commentRows = list.filter((c) => c && !c.is_deleted && !c.deleted).slice(0, 20);
--            commentsOk = true;
--        } catch { threadUrl = null; }
++        if (cm !== fail) {
++            try {
++                threadUrl = httpsUrl(cm && cm.thread && cm.thread.url);
++                const list = Array.isArray(cm && cm.comments) ? cm.comments : [];
++                commentRows = list.filter((c) => c && !c.is_deleted && !c.deleted).slice(0, 20);
++                commentsOk = true;
++            } catch { threadUrl = null; }
++        }
  
          let chatRows = null;
--        try {
--            const replay = await chat.chatReplay(vod.stream_id);
--            chatRows = chatMessageRows(vod, replay && Array.isArray(replay.messages) ? replay.messages : []);
--        } catch { chatRows = null; }
++        if (replay !== fail) {
++            try { chatRows = chatMessageRows(vod, replay && Array.isArray(replay.messages) ? replay.messages : []); } catch { chatRows = null; }
++        }
  
          const unlisted = vod.visibility === 'unlisted';
          const channelName = vod.display_name || vod.username || null;
@@@ -787,8 +794,6 @@ ${uploaded.length ? html`<section class="ovv-section" aria-labelledby="h-uploads
          if (vod.stream_category) metaParts.push(vod.stream_category);
          if (vod.view_count != null) metaParts.push(`${Number(vod.view_count) || 0} views`);
  
--        const saveForm = await playlistForm(req, 'vod', id);
--        const up = await upNext(req, 'vod', id);
          const nextAttr = up.nextUrl ? html` data-ovv-next="${up.nextUrl}"` : '';
          const viewAttr = html` data-ovv-view="${livePublic}/api/views/vod/${id}"`;
          const hlsAttr = hlsAttrs(vod);
@@@ -847,11 +852,14 @@ ${clips.length ? html`<section class="ovv-panel" aria-labelledby="h-clips"><h2 i
          const clip = data.clip;
          const manageable = mayManage(req, 'clip', clip);
  
++        // The comment thread, the playlist form and up next are asked together.
++        const [cm, saveForm, up] = await Promise.all([
++            Promise.resolve().then(() => live.comments('clip', id)).catch(() => null),
++            playlistForm(req, 'clip', id),
++            upNext(req, 'clip', id),
++        ]);
          let threadUrl = null;
--        try {
--            const cm = await live.comments('clip', id);
--            threadUrl = httpsUrl(cm && cm.thread && cm.thread.url);
--        } catch { threadUrl = null; }
++        try { threadUrl = httpsUrl(cm && cm.thread && cm.thread.url); } catch { threadUrl = null; }
  
          const unlisted = clip.visibility === 'unlisted';
          // AI clips stay out of search, as on Live: noindex and no structured data.
@@@ -864,8 +872,6 @@ ${clips.length ? html`<section class="ovv-panel" aria-labelledby="h-clips"><h2 i
          const madeBy = clip.display_name || clip.username || 'an OpenVibe member';
          const attribution = clip.auto_generated ? `AI clip from ${sourceName}'s stream` : `Made by ${madeBy}`;
  
--        const saveForm = await playlistForm(req, 'clip', id);
--        const up = await upNext(req, 'clip', id);
          const nextAttr = up.nextUrl ? html` data-ovv-next="${up.nextUrl}"` : '';
          const viewAttr = html` data-ovv-view="${livePublic}/api/views/clip/${id}"`;
          const hlsAttr = hlsAttrs(clip);