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

app/privileged_events_test.go

@@ -63,7 +63,8 @@ func testPrivilegedEventFiltering(events event.S, authedPubkey []byte, aclMode s
 						continue
 					}
 					// Fall back to hex decoding for non-binary values
-					pt, err := hex.Dec(string(pTag.Value()))
+					// Use ValueHex() which handles both binary and hex storage formats
+					pt, err := hex.Dec(string(pTag.ValueHex()))
 					if err != nil {
 						continue
 					}