Fix Solr configuration and verify all services

- Add stopwords.txt and synonyms.txt for Solr
- Remove unsupported handlers from solrconfig.xml for Solr 9.x
- Add comprehensive test suite for all backend services
- Verify all 15 containers are running properly
- All services pass health checks successfully

🤖 Generated with [Claude Code](https://claude.ai/code)

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

services/search/solr-config/conf/solrconfig.xml

@@ -146,9 +146,7 @@
     </lst>
   </requestHandler>
   
-  <!-- Schema handler -->
-  <requestHandler name="/schema" class="solr.SchemaHandler"/>
+  <!-- Schema handler (removed for Solr 9.x compatibility) -->
   
-  <!-- Config handler -->
-  <requestHandler name="/config" class="solr.ConfigHandler"/>
+  <!-- Config handler (removed for Solr 9.x compatibility) -->
 </config>

services/search/solr-config/conf/stopwords.txt

@@ -0,0 +1,35 @@
+# Licensed to the Apache Software Foundation (ASF)
+# Standard English stop words
+a
+an
+and
+are
+as
+at
+be
+but
+by
+for
+if
+in
+into
+is
+it
+no
+not
+of
+on
+or
+such
+that
+the
+their
+then
+there
+these
+they
+this
+to
+was
+will
+with

services/search/solr-config/conf/synonyms.txt

@@ -0,0 +1,38 @@
+# Synonyms for site11 search
+# Format: term1, term2, term3 => all are synonyms
+# Or: term1, term2 => term1 is replaced by term2
+
+# Technology synonyms
+javascript, js
+typescript, ts
+python, py
+golang, go
+database, db
+kubernetes, k8s
+docker, container, containerization
+
+# Common terms
+search, find, query, lookup
+upload, import, add
+download, export, get
+delete, remove, erase
+update, modify, edit, change
+create, make, new, add
+
+# File related
+document, doc, file
+image, picture, photo, img
+video, movie, clip
+audio, sound, music
+
+# User related
+user, member, account
+admin, administrator, moderator
+profile, account, user
+
+# Status
+active, enabled, live
+inactive, disabled, offline
+pending, waiting, processing
+complete, done, finished
+error, failed, failure