Implement similar products endpoint with timeout and partial-failure handling

.gitattributes

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+/mvnw text eol=lf
+*.cmd text eol=crlf

.gitignore

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+HELP.md
+target/
+.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/

.graphify/.building

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+2026-07-29T12:01:37.288Z

.graphifyignore

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+# axet-graphify-managed v3
+# Semantic files excluded — graphify runs in code-only AST mode
+# Text documents (classified as semantic by graphify)
+*.md
+*.mdx
+*.qmd
+*.txt
+*.rst
+*.adoc
+*.html
+*.htm
+*.yaml
+*.yml
+# Office / PDF / Google Workspace documents
+*.pdf
+*.docx
+*.doc
+*.pptx
+*.ppt
+*.xlsx
+*.xls
+*.odt
+*.odp
+*.ods
+*.rtf
+*.gdoc
+*.gsheet
+*.gslides
+# Images
+*.png
+*.jpg
+*.jpeg
+*.gif
+*.svg
+*.webp
+*.ico
+*.bmp
+*.tiff
+# Audio / Video
+*.mp4
+*.mp3
+*.wav
+*.avi
+*.mov
+*.mkv
+*.webm
+*.m4a
+*.m4v
+*.ogg
+# Common non-code dirs
+node_modules/
+.git/
+dist/
+out/
+build/
+coverage/
+# Machine-generated source (huge files, noise in the graph, heavy to parse)
+generated/
+__generated__/
+.graphify/

.mvn/wrapper/maven-wrapper.properties

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+wrapperVersion=3.3.4
+distributionType=only-script
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.16/apache-maven-3.9.16-bin.zip