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/models/cv.go

@@ -4,11 +4,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"html/template"
-	"log"
 	"os"
-	"time"
-
-	"github.com/juanatsap/cv-site/internal/cache"
 )
 
 // CV represents the complete curriculum vitae structure
@@ -16,7 +12,6 @@ type CV struct {
 	Personal       Personal        `json:"personal"`
 	Summary        string          `json:"summary"`
 	Experience     []Experience    `json:"experience"`
-	AIDevelopment  AIDevelopment   `json:"ai_development"`
 	Education      []Education     `json:"education"`
 	Skills         Skills          `json:"skills"`
 	Languages      []Language      `json:"languages"`
@@ -62,20 +57,6 @@ type Experience struct {
 	Duration         string   `json:"-"` // Calculated field, not from JSON
 }
 
-type AIDevelopment struct {
-	Title        string     `json:"title"`
-	Period       string     `json:"period"`
-	Description  string     `json:"description"`
-	Skills       []AISkill  `json:"skills"`
-	Achievements []string   `json:"achievements"`
-}
-
-type AISkill struct {
-	Category    string   `json:"category"`
-	Proficiency string   `json:"proficiency"`
-	Items       []string `json:"items"`
-}
-
 type Education struct {
 	Degree      string `json:"degree"`
 	Institution string `json:"institution"`
@@ -193,104 +174,42 @@ type TechStack struct {
 	CSS3   string `json:"css3"`
 }
 
-// Global cache instance (initialized in main.go)
-var cvCache *cache.CVCache
-
-// InitCache initializes the global cache with specified TTL
-func InitCache(ttl time.Duration) {
-	cvCache = cache.New(ttl)
-	log.Printf("✓ Cache initialized (TTL: %v)", ttl)
-}
-
-// GetCache returns the cache instance (for stats/management)
-func GetCache() *cache.CVCache {
-	return cvCache
-}
-
 // LoadCV loads CV data from a JSON file for the specified language
-// Uses cache if available, falls back to disk on cache miss
 func LoadCV(lang string) (*CV, error) {
-	// Validate language
 	if lang != "en" && lang != "es" {
 		return nil, fmt.Errorf("unsupported language: %s", lang)
 	}
 
-	// Try cache first if available
-	if cvCache != nil {
-		cacheKey := cache.BuildKey("cv", lang)
-		if cached, found := cvCache.Get(cacheKey); found {
-			if cv, ok := cached.(*CV); ok {
-				return cv, nil
-			}
-			// Invalid cache entry, invalidate it
-			cvCache.Invalidate(cacheKey)
-		}
-	}
-
-	// Cache miss or no cache - load from disk
 	filename := fmt.Sprintf("data/cv-%s.json", lang)
-
-	// Read the JSON file
 	data, err := os.ReadFile(filename)
 	if err != nil {
 		return nil, fmt.Errorf("error reading file %s: %w", filename, err)
 	}
 
-	// Parse JSON
 	var cv CV
 	if err := json.Unmarshal(data, &cv); err != nil {
 		return nil, fmt.Errorf("error parsing JSON: %w", err)
 	}
 
-	// Store in cache if available
-	if cvCache != nil {
-		cacheKey := cache.BuildKey("cv", lang)
-		cvCache.Set(cacheKey, &cv)
-	}
-
 	return &cv, nil
 }
 
 // LoadUI loads UI translations from a JSON file for the specified language
-// Uses cache if available, falls back to disk on cache miss
 func LoadUI(lang string) (*UI, error) {
-	// Validate language
 	if lang != "en" && lang != "es" {
 		return nil, fmt.Errorf("unsupported language: %s", lang)
 	}
 
-	// Try cache first if available
-	if cvCache != nil {
-		cacheKey := cache.BuildKey("ui", lang)
-		if cached, found := cvCache.Get(cacheKey); found {
-			if ui, ok := cached.(*UI); ok {
-				return ui, nil
-			}
-			// Invalid cache entry, invalidate it
-			cvCache.Invalidate(cacheKey)
-		}
-	}
-
-	// Cache miss or no cache - load from disk
 	filename := fmt.Sprintf("data/ui-%s.json", lang)
-
-	// Read the JSON file
 	data, err := os.ReadFile(filename)
 	if err != nil {
 		return nil, fmt.Errorf("error reading file %s: %w", filename, err)
 	}
 
-	// Parse JSON
 	var ui UI
 	if err := json.Unmarshal(data, &ui); err != nil {
 		return nil, fmt.Errorf("error parsing JSON: %w", err)
 	}
 
-	// Store in cache if available
-	if cvCache != nil {
-		cacheKey := cache.BuildKey("ui", lang)
-		cvCache.Set(cacheKey, &ui)
-	}
-
 	return &ui, nil
 }