feat: cache license info for better efficiency

Introduced caching for license data retrieved from the MediaWiki API. This avoids redundant API requests by storing the license information for each base URL. Enhances performance and reduces the risk of hitting request limits or encountering errors due to multiple API calls.

src/wikimore/app.py

@@ -116,6 +116,7 @@ def get_wikimedia_projects() -> (
 
 
 app.wikimedia_projects, app.languages = get_wikimedia_projects()
+app.licenses = {}
 
 logger.debug(
     f"Loaded {len(app.wikimedia_projects)} Wikimedia projects and {len(app.languages)} languages"
@@ -426,19 +427,21 @@ def wiki_article(
 
     processed_html = str(body)
 
-    # Get license information from the article
-    mediawiki_api_request = urllib.request.Request(
-        f"{base_url}/w/rest.php/v1/page/{escape(quote(title.replace(" ", "_")), True)}",
-        headers=HEADERS,
-    )
+    # Get license information for the article
+    if base_url not in app.licenses:
+        try:
+            mediawiki_api_request = urllib.request.Request(
+                f"{base_url}/w/rest.php/v1/page/{escape(quote(title.replace(" ", "_")), True)}",
+                headers=HEADERS,
+            )
+            mediawiki_api_response = urllib.request.urlopen(mediawiki_api_request)
+            mediawiki_api_data = json.loads(mediawiki_api_response.read().decode())
+            app.licenses[base_url] = license = mediawiki_api_data["license"]
+        except Exception as e:
+            license = None
 
-    try:
-        with urllib.request.urlopen(mediawiki_api_request) as response:
-            data = json.loads(response.read().decode())
-        license = data["license"]
-    except Exception as e:
-        logger.error(f"Error fetching license information: {e}")
-        license = None
+    else:
+        license = app.licenses[base_url]
 
     # Render the article
     return render_template(