Add archive relay query augmentation and access-based GC (v0.45.0)

- Add async archive relay querying (local results immediate, archives in background)
- Add query caching with filter normalization to avoid repeated requests
- Add session-deduplicated access tracking for events
- Add continuous garbage collection based on access patterns
- Auto-detect storage limit (80% of filesystem) when ORLY_MAX_STORAGE_BYTES=0
- Support NIP-50 search queries to archive relays

New environment variables:
- ORLY_ARCHIVE_ENABLED: Enable archive relay query augmentation
- ORLY_ARCHIVE_RELAYS: Comma-separated archive relay URLs
- ORLY_ARCHIVE_TIMEOUT_SEC: Archive query timeout
- ORLY_ARCHIVE_CACHE_TTL_HRS: Query deduplication window
- ORLY_GC_ENABLED: Enable access-based garbage collection
- ORLY_MAX_STORAGE_BYTES: Max storage (0=auto 80%)
- ORLY_GC_INTERVAL_SEC: GC check interval
- ORLY_GC_BATCH_SIZE: Events per GC cycle

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/handle-websocket.go

@@ -3,6 +3,7 @@ package app
 import (
 	"context"
 	"crypto/rand"
+	"fmt"
 	"net/http"
 	"strings"
 	"time"
@@ -99,15 +100,17 @@ whitelist:
 		handlerSemSize = 100 // Default if not configured
 	}
 
+	now := time.Now()
 	listener := &Listener{
 		ctx:            ctx,
 		cancel:         cancel,
 		Server:         s,
 		conn:           conn,
 		remote:         remote,
+		connectionID:   fmt.Sprintf("%s-%d", remote, now.UnixNano()), // Unique connection ID for access tracking
 		req:            r,
 		cashuToken:     cashuToken, // Verified Cashu access token (nil if none provided)
-		startTime:      time.Now(),
+		startTime:      now,
 		writeChan:      make(chan publish.WriteRequest, 100), // Buffered channel for writes
 		writeDone:      make(chan struct{}),
 		messageQueue:   make(chan messageRequest, 100), // Buffered channel for message processing