feat: simplify architecture by removing cache layer and centralizing routes

- Removed over-engineered cache system for static CV data that only changes on deployment
- Extracted all route configuration to internal/routes/routes.go for better organization
- Implemented rate limiting and cache control middleware for PDF endpoint protection

internal/handlers/health.go

@@ -5,24 +5,13 @@ import (
 	"log"
 	"net/http"
 	"time"
-
-	"github.com/juanatsap/cv-site/internal/models"
 )
 
 // HealthResponse represents the health check response
 type HealthResponse struct {
-	Status    string     `json:"status"`
-	Timestamp time.Time  `json:"timestamp"`
-	Version   string     `json:"version"`
-	Cache     *CacheInfo `json:"cache,omitempty"`
-}
-
-// CacheInfo represents cache statistics
-type CacheInfo struct {
-	Hits    int64   `json:"hits"`
-	Misses  int64   `json:"misses"`
-	Size    int     `json:"size"`
-	HitRate float64 `json:"hit_rate_percent"`
+	Status    string    `json:"status"`
+	Timestamp time.Time `json:"timestamp"`
+	Version   string    `json:"version"`
 }
 
 // HealthHandler handles health check requests
@@ -45,21 +34,9 @@ func (h *HealthHandler) Check(w http.ResponseWriter, r *http.Request) {
 		Version:   h.version,
 	}
 
-	// Include cache stats if available
-	if cache := models.GetCache(); cache != nil {
-		stats := cache.GetStats()
-		response.Cache = &CacheInfo{
-			Hits:    stats.Hits,
-			Misses:  stats.Misses,
-			Size:    stats.Size,
-			HitRate: cache.HitRate(),
-		}
-	}
-
 	w.Header().Set("Content-Type", "application/json")
 	w.WriteHeader(http.StatusOK)
 	if err := json.NewEncoder(w).Encode(response); err != nil {
-		// Log error but don't change response status (already written)
 		log.Printf("ERROR encoding health check response: %v", err)
 	}
 }