Fix documentation build issues in cross-language blog post

- Add missing tags to tags.yml (cross-language, symbol-resolution, polyglot, dependency-analysis)
- Fix broken link from non-existent incremental-indexing post to existing graph-based-analysis post
- Resolves Docusaurus build failure due to broken links and undefined tags

Author: milliondreams

codeprism-docs/blog/2025-06-22-cross-language-symbol-resolution.md

@@ -790,4 +790,4 @@ The future of code intelligence isn't about better Python analysis or smarter Ja
 
 *Ready to trace dependencies across your entire polyglot codebase? Try CodePrism and discover connections you never knew existed.*
 
-**Continue reading our series**: [Real-Time Code Intelligence: Building Incremental Indexing for Live Development](./incremental-indexing-live-development) 
+**Continue reading our series**: [Building a Graph-Based Code Analysis Engine: Architecture Deep Dive](./graph-based-code-analysis-engine) 

codeprism-docs/blog/tags.yml

@@ -142,3 +142,23 @@ technical-deep-dive:
   label: Technical Deep Dive
   permalink: /technical-deep-dive
   description: In-depth technical posts
+
+cross-language:
+  label: Cross-Language
+  permalink: /cross-language
+  description: Posts about cross-language code analysis and integration
+
+symbol-resolution:
+  label: Symbol Resolution
+  permalink: /symbol-resolution
+  description: Posts about symbol resolution and code linking
+
+polyglot:
+  label: Polyglot
+  permalink: /polyglot
+  description: Posts about polyglot programming and multi-language codebases
+
+dependency-analysis:
+  label: Dependency Analysis
+  permalink: /dependency-analysis
+  description: Posts about analyzing code dependencies and relationships