Release v2.16.0

Backend Changes

⛔ Breaking Changes

• Enforce Go version consistency across the codebase; require Go 1.25.7 (@Copilot in #8052)
• Remove legacy response format of remote sampling endpoint (@yurishkuro in #8014)

✨ New Features

• Feat: add schemagen for internal extensions (#6186) (@SoumyaRaikwar in #7947)

🐞 Bug fixes, Minor Improvements

• [kafka receiver config] replace traces.topic: with traces.topics: (@Copilot in #8144)
• Disable bulk processor in es authenticator test to prevent goroutine leaks (@Copilot in #8124)
• Add support for es health-check timeout at startup (@ntdkhiem in #8096)
• Support max trace size issue in the query service (@yurishkuro in #8098)
• Add empty span name sanitizer (@Copilot in #8086)
• [memory] include link attributes when searching by tags (@Manik2708 in #8077)
• Fix(ci): update upload-artifact to v6 in metrics comparison workflow (@jkowall in #8000)

🚧 Experimental Features

• [clickhouse][perf] restructure clickhouse findtraceids query to improve performance (@mahadzaryab1 in #8125)
• [cassandra][v2] refactor fromdbmodel and todbmodel to accept and return dbmodel.span (@Manik2708 in #7844)

👷 CI Improvements

• Remove otel_scope_version label from metrics comparison (@yurishkuro in #8145)
• Ci: always update summary report comment if present (@yurishkuro in #8135)
• Ci: extract ci summary publish script to .github/scripts/ with unit tests (@yurishkuro in #8134)
• Ci: split ci summary report into compute + publish workflows (@yurishkuro in #8132)
• Ci: use gh pr list to get pr number (@yurishkuro in #8123)
• Ci: log trigger event for debugging (@yurishkuro in #8122)
• Ci: fix summary report to be able to retrieve pr number (@yurishkuro in #8121)
• Ci: migrate coverage gating from codecov to github actions (@yurishkuro in #8111)
• Ci: migrate coverage gating from codecov to github actions (@yurishkuro in #8101)
• Fix: correct bot detection in ci parallel mode (@Copilot in #8097)
• [chore] fix bot names (@yurishkuro in #8094)
• Refactor(ci): implement forked dag orchestrator for conditional parallelism (@Copilot in #8093)
• [test] upgrade integration tests fixtures to otlp traces (@Manik2708 in #8079)
• [test] upgrade default.json fixture to otlp traces (@Manik2708 in #8076)
• [test] upgrade span_tags_trace.json from v1 model to ptrace.traces (@Manik2708 in #8044)
• Reorganize ci into 3-tier sequential pipeline with fail-fast behavior (@Copilot in #8060)
• [test] refactor integration tests to directly write/read ptrace.traces (@Manik2708 in #7812)
• Use ifneq instead of ifndef for skip_debug_binaries check (@Copilot in #8039)
• Fix release process issues: command copy buttons, documentation tagging, and release.md rotation (@jkowall in #7990)

⚙️ Refactoring

• Apply go fix ./... (@yurishkuro in #8074)
• Migrate http servers from gorilla mux to stdlib http.ServeMux (@Copilot in #8013)
• Remove legacy sampling strategy marshaling code (@yurishkuro in #8017)

📖 Documentation

• Fix typos and outdated path in elasticsearch readme files (@cluster2600 in #8068)
• [chore] add automated scanner policy and vulncheck target (@xenonnn4w in #8043)

📊 UI Changes

🐞 Bug fixes, Minor Improvements

• Rename main package to @jaegertracing/jaeger-ui (@yurishkuro in #3560)
• Fix: white hover line overflow on critical path segments (@Parship12 in #3550)
• Fix v3 api client ignoring base path prefix (@Copilot in #3549)
• Fix spm metrics not fetched on initial load due to null check (@Copilot in #3538)

🚧 Experimental Features

• [adr-0006] phase 1: layout mode state and toggle controls (@yurishkuro in #3558)
• Adr 006: span details in side panel (@yurishkuro in #3556)

⚙️ Refactoring

• Refactor(plexus): convert nodeslayer from class to functional component (@thc1006 in #3413)
• Refactor(plexus): convert svglayer from class to functional component (@thc1006 in #3410)
• Refactor(plexus): convert svglayersgroup from class to functional component (@thc1006 in #3412)
• Refactor(plexus): migrate svgedge to functional component (#3396) (@hharshhsaini in #3527)