Add missing newline at end of several markdown files

Appended a newline at the end of multiple documentation files in .serena/memories to conform to POSIX standards and improve file formatting consistency.

Author: imbajin

.serena/memories/README_INDEX.md

@@ -241,4 +241,4 @@ Onboarding completed: 2025-11-05
 
 ---
 
-**Note**: All memories are stored in `.serena/memories/` directory and can be read using Serena MCP tools.
+**Note**: All memories are stored in `.serena/memories/` directory and can be read using Serena MCP tools.

.serena/memories/architecture_and_design_patterns.md

@@ -569,4 +569,4 @@ server.port=8088
 spring.application.name=hugegraph-hubble
 graph.server.host=localhost
 graph.server.port=8080
-```
+```

.serena/memories/code_style_and_conventions.md

@@ -309,4 +309,4 @@ src/test/java/
 ### Go Error Handling
 - Return errors explicitly: `func() (result, error)`
 - Handle errors at call site
-- Wrap errors with context: `fmt.Errorf("context: %w", err)`
+- Wrap errors with context: `fmt.Errorf("context: %w", err)`

.serena/memories/common_development_workflows.md

@@ -655,4 +655,4 @@ chmod +x .git/hooks/pre-commit
 - Project Docs: https://hugegraph.apache.org/docs/
 - API Docs: https://hugegraph.apache.org/docs/clients/restful-api/
 - GitHub Issues: https://github.com/apache/hugegraph-toolchain/issues
-- Mailing List: dev@hugegraph.apache.org
+- Mailing List: dev@hugegraph.apache.org

.serena/memories/project_overview.md

@@ -123,4 +123,4 @@ toolchain/
 ├── tools/                    # Checkstyle, suppressions
 ├── .github/workflows/        # CI/CD pipelines
 └── pom.xml                   # Root Maven config
-```
+```

.serena/memories/task_completion_checklist.md

@@ -370,4 +370,4 @@ make test
 
 ---
 
-**CRITICAL**: Do NOT commit code that fails any of the required checks. CI will fail and PR will be blocked.
+**CRITICAL**: Do NOT commit code that fails any of the required checks. CI will fail and PR will be blocked.

.serena/memories/testing_infrastructure.md

@@ -632,4 +632,4 @@ go test -v
 
 # Frontend verbose
 yarn test --verbose
-```
+```