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_import.go

@@ -13,7 +13,7 @@ import (
 	"git.fabledsword.com/bvandeusen/minstrel/internal/lifecycle"
 )
 
-// Downloads and their imports (M502 #5522): the Wanted view's Activity tab,
+// Downloads and their imports: the Wanted view's Activity tab,
 // a person's "import anyway", "refuse" and "retry", and the Blocked tab.
 
 // downloadView is one grab and what its import made of it.
@@ -41,7 +41,7 @@ type downloadView struct {
 	Files         []string           `json:"files"`
 	Skipped       int                `json:"skipped"`
 	RehomedFrom   string             `json:"rehomed_from,omitempty"`
-	// EndDetail says why an ended download ended (#5523).
+	// EndDetail says why an ended download ended.
 	EndDetail string `json:"end_detail"`
 	// Seeding: imported and still sharing; Ratio its share ratio as last
 	// read; SeedReleasedAt when it was removed once it had shared enough.
@@ -113,7 +113,7 @@ type downloadsPage struct {
 	Items  []downloadView `json:"items"`
 	Limit  int            `json:"limit"`
 	Offset int            `json:"offset"`
-	// ClientsDown are the download clients not answering now (#5523).
+	// ClientsDown are the download clients not answering now.
 	ClientsDown []clientDownView `json:"clients_down"`
 }
 
@@ -239,7 +239,7 @@ type releaseBlockView struct {
 	Detail    string `json:"detail"`
 	BlockedAt string `json:"blocked_at"`
 	// ExpiresAt is when a release given up on may be taken again; null is
-	// for good (#5523).
+	// for good.
 	ExpiresAt  *string `json:"expires_at"`
 	WantTitle  string  `json:"want_title"`
 	WantArtist string  `json:"want_artist"`