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_reacquisition.go

@@ -10,12 +10,12 @@ import (
 	"git.fabledsword.com/bvandeusen/minstrel/internal/reacquisition"
 )
 
-// reacquisitionSettingsResp is the admin card's payload (milestone #290).
+// reacquisitionSettingsResp is the admin card's payload.
 //
 // Carries more than the stored settings: [UnnameableAlbums] is the count of
 // albums with missing files that can never be wanted automatically because
 // neither they nor their artist has an MBID. The card states that number
-// rather than leaving the operator to wonder why some rows never get wanted —
+// rather than leaving an admin to wonder why some rows never get wanted —
 // a feature that silently does nothing for part of its input reads as broken.
 type reacquisitionSettingsResp struct {
 	Enabled    bool  `json:"enabled"`
@@ -25,12 +25,14 @@ type reacquisitionSettingsResp struct {
 	UnnameableAlbums int64 `json:"unnameable_albums"`
 }
 
-// handleGetReacquisitionSettings implements GET /api/admin/library/reacquisition.
+// handleGetReacquisitionSettings implements GET
+// /api/admin/library/reacquisition.
 func (h *handlers) handleGetReacquisitionSettings(w http.ResponseWriter, r *http.Request) {
 	writeJSON(w, http.StatusOK, h.reacquisitionPayload(r))
 }
 
-// handleUpdateReacquisitionSettings implements PUT /api/admin/library/reacquisition.
+// handleUpdateReacquisitionSettings implements PUT
+// /api/admin/library/reacquisition.
 func (h *handlers) handleUpdateReacquisitionSettings(w http.ResponseWriter, r *http.Request) {
 	var req reacquisitionSettingsResp
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {