refactor(docs): consolidate and cleanup documentation

- Delete 9 deprecated/obsolete docs (~6,300 lines removed)
- Move test PDFs to tests/fixtures/ocr-samples/
- Create docs/DEPLOYMENT.md as principal guide
- Create tests/ocr-validation/README.md
- Update all refs for ultrathin monolith architecture
- Update OCR tests to use relative paths

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

public/web.config

@@ -4,7 +4,7 @@
   ROA2WEB - IIS Sub-Application Configuration
   ====================================================================
 
-  ⚠️ CRITICAL - For IIS Sub-Application Deployment! ⚠️
+  CRITICAL - For IIS Sub-Application Deployment!
 
   This web.config is for when IIS is configured as SUB-APPLICATION:
   - IIS Application Path: /roa2web
@@ -19,11 +19,11 @@
   **Production Architecture (2-Tier IIS)**:
 
   Public Server (10.0.20.122 - roa2web.romfast.ro)
-    └─ Proxies ALL to → https://10.0.20.36/{REQUEST_PATH}
+    - Proxies ALL to -> https://10.0.20.36/{REQUEST_PATH}
 
   Internal Server (10.0.20.36)
-    └─ IIS Sub-App: /roa2web → Physical: C:\inetpub\wwwroot\roa2web\frontend
-        └─ This web.config proxies /api/* to localhost:8000
+    - IIS Sub-App: /roa2web -> Physical: C:\inetpub\wwwroot\roa2web\frontend
+        - This web.config proxies /api/* to localhost:8000
 
   See: deployment/windows/docs/TWO-TIER-IIS-DEPLOYMENT.md
 
@@ -56,6 +56,30 @@
           <action type="Rewrite" url="index.html" />
         </rule>
       </rules>
+
+      <!-- Outbound rules to set Cache-Control based on request path -->
+      <outboundRules>
+        <!-- API responses: NO caching (let backend cache handle it) -->
+        <rule name="No Cache for API" preCondition="IsAPIRequest">
+          <match serverVariable="RESPONSE_Cache-Control" pattern=".*" />
+          <action type="Rewrite" value="no-store, no-cache, must-revalidate, proxy-revalidate" />
+        </rule>
+
+        <!-- Static assets: cache for 1 year -->
+        <rule name="Cache Static Assets" preCondition="IsStaticAsset">
+          <match serverVariable="RESPONSE_Cache-Control" pattern=".*" />
+          <action type="Rewrite" value="public, max-age=31536000" />
+        </rule>
+
+        <preConditions>
+          <preCondition name="IsAPIRequest">
+            <add input="{URL}" pattern="^/api/" />
+          </preCondition>
+          <preCondition name="IsStaticAsset">
+            <add input="{URL}" pattern="\.(js|css|png|jpg|jpeg|gif|svg|woff|woff2|ttf|ico|webmanifest)$" />
+          </preCondition>
+        </preConditions>
+      </outboundRules>
     </rewrite>
 
     <!-- Static content configuration -->
@@ -68,12 +92,5 @@
       <remove fileExtension=".json" />
       <mimeMap fileExtension=".json" mimeType="application/json" />
     </staticContent>
-
-    <!-- Client cache for static assets (1 year) -->
-    <httpProtocol>
-      <customHeaders>
-        <add name="Cache-Control" value="public, max-age=31536000" />
-      </customHeaders>
-    </httpProtocol>
   </system.webServer>
 </configuration>