Re-vendor the shared files from sneak/prompts at 0653579 (closes #52)

Takes .golangci.yml, .dockerignore, .gitignore, .editorconfig, the
workflow and REPO_POLICIES.md from sneak/prompts 0653579, with this
repository's own entries after the shared content. Lint (golangci-lint
v2.14.0) and test are Dockerfile phases that script/lint and script/test
build alone with a new CACHEBUST value, keeping Go's and golangci-lint's
caches; the image build depends on both. make fmt and make fmt-check also
format the markdown with prettier, pinned in yarn.lock. The agent
guidance moves to AGENTS.md. The Go code is fixed for what the new
configuration finds, and the AS and prefix detail reads now return the
rows' error after their loops.

Model: opus-5-5

internal/server/middleware.go

@@ -15,6 +15,7 @@ import (
 // responseWriter wraps http.ResponseWriter to capture the response
 type responseWriter struct {
 	http.ResponseWriter
+
 	body       *bytes.Buffer
 	statusCode int
 	written    bool
@@ -87,8 +88,10 @@ func JSONResponseMiddleware(next http.Handler) http.Handler {
 		}
 
 		// Parse the original response
-		var originalResponse map[string]interface{}
-		if err := json.Unmarshal(rw.body.Bytes(), &originalResponse); err != nil {
+		var originalResponse map[string]any
+
+		err := json.Unmarshal(rw.body.Bytes(), &originalResponse)
+		if err != nil {
 			// If we can't parse it, just write original
 			w.WriteHeader(rw.statusCode)
 			_, _ = w.Write(rw.body.Bytes())
@@ -97,7 +100,7 @@ func JSONResponseMiddleware(next http.Handler) http.Handler {
 		}
 
 		// Add @meta field
-		originalResponse["@meta"] = map[string]interface{}{
+		originalResponse["@meta"] = map[string]any{
 			"time_zone":      "UTC",
 			"api_version":    1,
 			"execution_time": fmt.Sprintf("%d ms", execTime.Milliseconds()),
@@ -160,8 +163,10 @@ func JSONValidationMiddleware(next http.Handler) http.Handler {
 
 		// For JSON responses, validate the JSON
 		if rw.body.Len() > 0 {
-			var testParse interface{}
-			if err := json.Unmarshal(rw.body.Bytes(), &testParse); err == nil {
+			var testParse any
+
+			err := json.Unmarshal(rw.body.Bytes(), &testParse)
+			if err == nil {
 				// Valid JSON, write it out
 				w.Header().Set("Content-Type", "application/json")
 				w.WriteHeader(rw.statusCode)
@@ -180,9 +185,11 @@ func JSONValidationMiddleware(next http.Handler) http.Handler {
 		if statusCode == http.StatusOK {
 			statusCode = http.StatusInternalServerError
 		}
+
 		if deadlinePassed(r.Context()) {
 			statusCode = http.StatusGatewayTimeout
 		}
+
 		w.WriteHeader(statusCode)
 
 		errorMsg := "Internal server error"
@@ -190,11 +197,11 @@ func JSONValidationMiddleware(next http.Handler) http.Handler {
 			errorMsg = requestTimeoutMessage
 		}
 
-		response := map[string]interface{}{
-			"status": "error",
-			"error": map[string]interface{}{
-				"msg":  errorMsg,
-				"code": statusCode,
+		response := map[string]any{
+			jsonKeyStatus: jsonStatusError,
+			jsonKeyError: map[string]any{
+				jsonKeyMsg:  errorMsg,
+				jsonKeyCode: statusCode,
 			},
 		}
 		_ = json.NewEncoder(w).Encode(response)
@@ -204,6 +211,7 @@ func JSONValidationMiddleware(next http.Handler) http.Handler {
 // statusWriter wraps http.ResponseWriter to capture the status code
 type statusWriter struct {
 	http.ResponseWriter
+
 	statusCode int
 	written    bool
 }
@@ -213,6 +221,7 @@ func (sw *statusWriter) WriteHeader(statusCode int) {
 		sw.statusCode = statusCode
 		sw.written = true
 	}
+
 	sw.ResponseWriter.WriteHeader(statusCode)
 }
 
@@ -252,11 +261,12 @@ func RequestLoggerMiddleware(logger *slog.Logger) func(http.Handler) http.Handle
 			// Slow query threshold (1 second)
 			const slowQueryThreshold = 1 * time.Second
 
-			if sw.statusCode >= http.StatusInternalServerError {
+			switch {
+			case sw.statusCode >= http.StatusInternalServerError:
 				logLevel = slog.LevelError
-			} else if sw.statusCode >= http.StatusBadRequest {
+			case sw.statusCode >= http.StatusBadRequest:
 				logLevel = slog.LevelWarn
-			} else if duration >= slowQueryThreshold {
+			case duration >= slowQueryThreshold:
 				logLevel = slog.LevelWarn
 			}