Refactor signer implementation to use p8k package

- Replaced all instances of p256k1signer with the new p8k.Signer across various modules, including event creation, policy handling, and database interactions.
- Updated related test cases and benchmarks to ensure compatibility with the new signer interface.
- Bumped version to v0.25.0 to reflect these significant changes and improvements in cryptographic operations.

cmd/aggregator/main.go

@@ -17,7 +17,7 @@ import (
 
 	"lol.mleku.dev/chk"
 	"lol.mleku.dev/log"
-	p256k1signer "p256k1.mleku.dev/signer"
+	"next.orly.dev/pkg/interfaces/signer/p8k"
 	"github.com/minio/sha256-simd"
 	"next.orly.dev/pkg/encoders/bech32encoding"
 	"next.orly.dev/pkg/encoders/event"
@@ -335,7 +335,10 @@ func NewAggregator(keyInput string, since, until *timestamp.T, bloomFilterFile s
 		}
 
 		// Create signer from private key
-		signer = p256k1signer.NewP256K1Signer()
+		var signerErr error
+		if signer, signerErr = p8k.New(); signerErr != nil {
+			return nil, fmt.Errorf("failed to create signer: %w", signerErr)
+		}
 		if err = signer.InitSec(secretBytes); chk.E(err) {
 			return nil, fmt.Errorf("failed to initialize signer: %w", err)
 		}