Refactor crypto package to use p256k1 signer

- Replaced the p256k package with p256k1.mleku.dev/signer across the codebase, updating all instances where the previous signer was utilized.
- Removed the deprecated p256k package, including all related files and tests, to streamline the codebase and improve maintainability.
- Updated various components, including event handling, database interactions, and protocol implementations, to ensure compatibility with the new signer interface.
- Enhanced tests to validate the new signing functionality and ensure robustness across the application.
- Bumped version to v0.23.3 to reflect these changes.

pkg/policy/benchmark_test.go

@@ -9,14 +9,14 @@ import (
 	"time"
 
 	"lol.mleku.dev/chk"
-	"next.orly.dev/pkg/crypto/p256k"
+	p256k1signer "p256k1.mleku.dev/signer"
 	"next.orly.dev/pkg/encoders/event"
 	"next.orly.dev/pkg/encoders/hex"
 	"next.orly.dev/pkg/encoders/tag"
 )
 
 // Helper function to create test event for benchmarks (reuses signer)
-func createTestEventBench(b *testing.B, signer *p256k.Signer, content string, kind uint16) *event.E {
+func createTestEventBench(b *testing.B, signer *p256k1signer.P256K1Signer, content string, kind uint16) *event.E {
 	ev := event.New()
 	ev.CreatedAt = time.Now().Unix()
 	ev.Kind = kind

pkg/policy/policy_integration_test.go

@@ -9,7 +9,7 @@ import (
 	"time"
 
 	"lol.mleku.dev/chk"
-	"next.orly.dev/pkg/crypto/p256k"
+	p256k1signer "p256k1.mleku.dev/signer"
 	"next.orly.dev/pkg/encoders/event"
 	"next.orly.dev/pkg/encoders/hex"
 	"next.orly.dev/pkg/encoders/kind"
@@ -23,13 +23,13 @@ func TestPolicyIntegration(t *testing.T) {
 	}
 
 	// Generate test keys
-	allowedSigner := &p256k.Signer{}
+	allowedSigner := p256k1signer.NewP256K1Signer()
 	if err := allowedSigner.Generate(); chk.E(err) {
 		t.Fatalf("Failed to generate allowed signer: %v", err)
 	}
 	allowedPubkeyHex := hex.Enc(allowedSigner.Pub())
 
-	unauthorizedSigner := &p256k.Signer{}
+	unauthorizedSigner := p256k1signer.NewP256K1Signer()
 	if err := unauthorizedSigner.Generate(); chk.E(err) {
 		t.Fatalf("Failed to generate unauthorized signer: %v", err)
 	}
@@ -367,13 +367,13 @@ func TestPolicyWithRelay(t *testing.T) {
 	}
 
 	// Generate keys
-	allowedSigner := &p256k.Signer{}
+	allowedSigner := p256k1signer.NewP256K1Signer()
 	if err := allowedSigner.Generate(); chk.E(err) {
 		t.Fatalf("Failed to generate allowed signer: %v", err)
 	}
 	allowedPubkeyHex := hex.Enc(allowedSigner.Pub())
 
-	unauthorizedSigner := &p256k.Signer{}
+	unauthorizedSigner := p256k1signer.NewP256K1Signer()
 	if err := unauthorizedSigner.Generate(); chk.E(err) {
 		t.Fatalf("Failed to generate unauthorized signer: %v", err)
 	}

pkg/policy/policy_test.go

@@ -10,7 +10,7 @@ import (
 	"time"
 
 	"lol.mleku.dev/chk"
-	"next.orly.dev/pkg/crypto/p256k"
+	p256k1signer "p256k1.mleku.dev/signer"
 	"next.orly.dev/pkg/encoders/event"
 	"next.orly.dev/pkg/encoders/hex"
 	"next.orly.dev/pkg/encoders/tag"
@@ -22,8 +22,8 @@ func int64Ptr(i int64) *int64 {
 }
 
 // Helper function to generate a keypair for testing
-func generateTestKeypair(t *testing.T) (signer *p256k.Signer, pubkey []byte) {
-	signer = &p256k.Signer{}
+func generateTestKeypair(t *testing.T) (signer *p256k1signer.P256K1Signer, pubkey []byte) {
+	signer = p256k1signer.NewP256K1Signer()
 	if err := signer.Generate(); chk.E(err) {
 		t.Fatalf("Failed to generate test keypair: %v", err)
 	}
@@ -32,8 +32,8 @@ func generateTestKeypair(t *testing.T) (signer *p256k.Signer, pubkey []byte) {
 }
 
 // Helper function to generate a keypair for benchmarks
-func generateTestKeypairB(b *testing.B) (signer *p256k.Signer, pubkey []byte) {
-	signer = &p256k.Signer{}
+func generateTestKeypairB(b *testing.B) (signer *p256k1signer.P256K1Signer, pubkey []byte) {
+	signer = p256k1signer.NewP256K1Signer()
 	if err := signer.Generate(); chk.E(err) {
 		b.Fatalf("Failed to generate test keypair: %v", err)
 	}
@@ -42,7 +42,7 @@ func generateTestKeypairB(b *testing.B) (signer *p256k.Signer, pubkey []byte) {
 }
 
 // Helper function to create a real test event with proper signing
-func createTestEvent(t *testing.T, signer *p256k.Signer, content string, kind uint16) *event.E {
+func createTestEvent(t *testing.T, signer *p256k1signer.P256K1Signer, content string, kind uint16) *event.E {
 	ev := event.New()
 	ev.CreatedAt = time.Now().Unix()
 	ev.Kind = kind
@@ -58,7 +58,7 @@ func createTestEvent(t *testing.T, signer *p256k.Signer, content string, kind ui
 }
 
 // Helper function to create a test event with a specific pubkey (for unauthorized tests)
-func createTestEventWithPubkey(t *testing.T, signer *p256k.Signer, content string, kind uint16) *event.E {
+func createTestEventWithPubkey(t *testing.T, signer *p256k1signer.P256K1Signer, content string, kind uint16) *event.E {
 	ev := event.New()
 	ev.CreatedAt = time.Now().Unix()
 	ev.Kind = kind