feat: add WatchMedium field, general review editing, configurable deploy

- WatchMedium enum (cinema/streaming/tv/physical_media/download/media_server/other)
- PATCH /api/v1/reviews/:id partial update (rating, comment, watched_at, watch_medium)
- edit_review use case w/ ownership + remote review guard, best-effort AP Update broadcast
- SPA: icon picker, edit sheet (long-press mobile / pencil desktop), watch medium badge
- shared ReviewFormFields, EditableContextMenu, parse_watched_at/format_watched_at
- deploy.sh parameterized (--features, --tag), CORS allows PATCH
- CONTEXT.md glossary, ADR-0001 general review editing

crates/adapters/template-askama/templates/activity_feed.html

@@ -42,6 +42,9 @@
           <span class="star {% if filled %}filled{% else %}empty{% endif %}">★</span>
         {% endfor %}
       </div>
+      {% if let Some(wm) = entry.review().watch_medium() %}
+      <span class="watch-medium">{{ wm }}</span>
+      {% endif %}
       {% if let Some(comment) = entry.review().comment() %}
       <div class="comment">{{ comment.value() }}</div>
       {% endif %}

crates/adapters/template-askama/templates/new_review.html

@@ -35,6 +35,19 @@
     Comment<br>
     <textarea name="comment"></textarea>
   </label>
+  <label>
+    Watched via <span class="optional">(optional)</span><br>
+    <select name="watch_medium">
+      <option value="">—</option>
+      <option value="cinema">Cinema</option>
+      <option value="streaming">Streaming</option>
+      <option value="tv">TV</option>
+      <option value="physical_media">Physical Media</option>
+      <option value="download">Download</option>
+      <option value="media_server">Media Server</option>
+      <option value="other">Other</option>
+    </select>
+  </label>
   <input type="hidden" name="_csrf" value="{{ ctx.csrf_token }}">
   <button type="submit">Log Review</button>
 </form>