Fix binary tag value handling for e/p tags across database layer

- Update nostr library to v1.0.3 with improved binary tag support
- Replace tag.Value() calls with tag.ValueHex() to handle both binary and hex formats
- Add NormalizeTagValueForHash() for consistent filter tag normalization
- Update QueryPTagGraph to handle binary-encoded and hex-encoded pubkeys
- Fix tag matching in query-events.go using TagValuesMatchUsingTagMethods
- Add filter_utils.go with tag normalization helper functions
- Update delete operations in process-delete.go and neo4j/delete.go
- Fix ACL follows extraction to use ValueHex() for consistent decoding
- Add binary_tag_filter_test.go for testing tag value normalization
- Bump version to v0.30.3

pkg/acl/follows.go

@@ -928,8 +928,8 @@ func (f *Follows) extractFollowedPubkeys(event *event.E) {
 			continue
 		}
 		// Fall back to hex decoding for non-binary values
-		// ValueHex() handles both formats, but we already checked binary above
-		if pubkey, err := hex.DecodeString(string(tag.Value())); err == nil && len(pubkey) == 32 {
+		// Use ValueHex() which handles both binary and hex storage formats
+		if pubkey, err := hex.DecodeString(string(tag.ValueHex())); err == nil && len(pubkey) == 32 {
 			f.AddFollow(pubkey)
 		}
 	}