Implement comprehensive WebSocket subscription stability fixes

- Resolved critical issues causing subscriptions to drop after 30-60 seconds due to unconsumed receiver channels.
- Introduced per-subscription consumer goroutines to ensure continuous event delivery and prevent channel overflow.
- Enhanced REQ parsing to handle both wrapped and unwrapped filter arrays, eliminating EOF errors.
- Updated publisher logic to correctly send events to receiver channels, ensuring proper event delivery to subscribers.
- Added extensive documentation and testing tools to verify subscription stability and performance.
- Bumped version to v0.26.2 to reflect these significant improvements.

pkg/encoders/envelopes/reqenvelope/reqenvelope.go

@@ -6,6 +6,7 @@ import (
 	"io"
 
 	"lol.mleku.dev/chk"
+	"lol.mleku.dev/log"
 	"next.orly.dev/pkg/encoders/envelopes"
 	"next.orly.dev/pkg/encoders/filter"
 	"next.orly.dev/pkg/encoders/text"
@@ -85,19 +86,24 @@ func (en *T) Marshal(dst []byte) (b []byte) {
 // string is correctly unescaped by NIP-01 escaping rules.
 func (en *T) Unmarshal(b []byte) (r []byte, err error) {
 	r = b
+	log.I.F("%s", r)
 	if en.Subscription, r, err = text.UnmarshalQuoted(r); chk.E(err) {
 		return
 	}
+	log.I.F("%s", r)
 	if r, err = text.Comma(r); chk.E(err) {
 		return
 	}
+	log.I.F("%s", r)
 	en.Filters = new(filter.S)
 	if r, err = en.Filters.Unmarshal(r); chk.E(err) {
 		return
 	}
+	log.I.F("%s", r)
 	if r, err = envelopes.SkipToTheEnd(r); chk.E(err) {
 		return
 	}
+	log.I.F("%s", r)
 	return
 }