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/admin_acquisition.go

@@ -13,7 +13,7 @@ import (
 	"git.fabledsword.com/bvandeusen/minstrel/internal/db/dbq"
 )
 
-// Indexers and download clients, admin side (M502 #5518). Rows the operator
+// Indexers and download clients, admin side. Rows an admin
 // adds and configures; nothing is seeded. Secrets are write-only: no response
 // carries one, only whether it is set.
 
@@ -79,9 +79,10 @@ func (h *handlers) handleListAcquisitionServices(w http.ResponseWriter, r *http.
 	writeJSON(w, http.StatusOK, map[string]any{"services": out})
 }
 
-// handleCreateAcquisitionService implements POST /api/admin/acquisition/services
-// with {"protocol": "prowlarr"|"torznab"|"qbittorrent"|"exchange"}. The row
-// starts switched off, with no address.
+// handleCreateAcquisitionService implements POST
+// /api/admin/acquisition/services with {"protocol":
+// "prowlarr"|"torznab"|"qbittorrent"|"exchange"}. The row starts switched off,
+// with no address.
 func (h *handlers) handleCreateAcquisitionService(w http.ResponseWriter, r *http.Request) {
 	var body struct {
 		Protocol string `json:"protocol"`