feat(embeddings): add embedding model support and related changes

* Introduced EmbeddingModel method in Client and Provider interfaces
* Updated InsertThought and SearchThoughts methods to handle embedding models
* Created embeddings table and updated match_thoughts function for model filtering
* Removed embedding column from thoughts table
* Adjusted permissions for new embeddings table

internal/mcpserver/schema_test.go

@@ -0,0 +1,42 @@
+package mcpserver
+
+import (
+	"testing"
+
+	"github.com/google/jsonschema-go/jsonschema"
+	"github.com/modelcontextprotocol/go-sdk/mcp"
+
+	"git.warky.dev/wdevs/amcs/internal/tools"
+)
+
+func TestSetToolSchemasUsesStringUUIDsInListOutput(t *testing.T) {
+	tool := &mcp.Tool{Name: "list_thoughts"}
+
+	if err := setToolSchemas[tools.ListInput, tools.ListOutput](tool); err != nil {
+		t.Fatalf("set tool schemas: %v", err)
+	}
+
+	schema, ok := tool.OutputSchema.(*jsonschema.Schema)
+	if !ok {
+		t.Fatalf("output schema type = %T, want *jsonschema.Schema", tool.OutputSchema)
+	}
+
+	thoughtsSchema := schema.Properties["thoughts"]
+	if thoughtsSchema == nil {
+		t.Fatal("missing thoughts schema")
+	}
+	if thoughtsSchema.Items == nil {
+		t.Fatal("missing thoughts item schema")
+	}
+
+	idSchema := thoughtsSchema.Items.Properties["id"]
+	if idSchema == nil {
+		t.Fatal("missing id schema")
+	}
+	if idSchema.Type != "string" {
+		t.Fatalf("id schema type = %q, want %q", idSchema.Type, "string")
+	}
+	if idSchema.Format != "uuid" {
+		t.Fatalf("id schema format = %q, want %q", idSchema.Format, "uuid")
+	}
+}