docs: api comments say what the endpoints do, not how they came to be (#6277)

Rewrites the internal/api comment blocks to rule 32: task, milestone and
rule ids gone, the stories behind them restated as the constraint they
left, stale references corrected (the stream secret is wired from config,
the timezone handler already refreshes the scheduler, the Android app is
the native client, the design docs cited are not in the repo). Also
rewraps comment lines over 80 columns left by the earlier batches.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/api/me_notifications.go

@@ -18,7 +18,7 @@ import (
 	"git.fabledsword.com/bvandeusen/minstrel/internal/notifications"
 )
 
-// The notifications inbox (M489). Rows are written by internal/notifications;
+// The notifications inbox. Rows are written by internal/notifications;
 // this surface lists them, counts the unread, marks them read, and holds each
 // user's per-kind settings.
 
@@ -125,8 +125,8 @@ func (h *handlers) handleListMyNotifications(w http.ResponseWriter, r *http.Requ
 	writeJSON(w, http.StatusOK, out)
 }
 
-// handleMyUnreadNotificationCount implements GET /api/me/notifications/unread-count,
-// the cheap call behind the badge.
+// handleMyUnreadNotificationCount implements GET
+// /api/me/notifications/unread-count, the cheap call behind the badge.
 func (h *handlers) handleMyUnreadNotificationCount(w http.ResponseWriter, r *http.Request) {
 	user, ok := requireUser(w, r)
 	if !ok {
@@ -165,7 +165,8 @@ func (h *handlers) handleMarkMyNotificationRead(w http.ResponseWriter, r *http.R
 	w.WriteHeader(http.StatusNoContent)
 }
 
-// handleMarkAllMyNotificationsRead implements POST /api/me/notifications/read-all.
+// handleMarkAllMyNotificationsRead implements POST
+// /api/me/notifications/read-all.
 func (h *handlers) handleMarkAllMyNotificationsRead(w http.ResponseWriter, r *http.Request) {
 	user, ok := requireUser(w, r)
 	if !ok {