Nikhil Soni bcf96f2816 feat(traces-qb): gate JSON span attribute reads behind a feature flag (#12966) ...

#### Description

- The new feature flag `use_trace_attributes_json` (default off) now
gates the JSON columns in the traces `getColumn`, alongside the
evolution entry.
- `SelectEvolutionsForColumns` now ignores evolutions of columns the
mapper didn't return instead of erroring, so a flag-off attribute
resolves to its map even though the key carries the JSON evolution.

Part of https://github.com/SigNoz/signoz/pull/12966

#### Additional Information

- Evolution entry migration: SigNoz/signoz-otel-collector#928
- Original QB PR: #4781

2026-10-01 10:21:10 +00:00

..

aitelemetryschema

fix: support for related values in ai field values (#12716)

2026-09-03 07:12:22 +00:00

audittelemetryschema

chore(querybuilder): compile every signal through one storage contract (#12802)

2026-09-15 11:36:06 +00:00

logstelemetryschema

perf(querybuilder): compare materialized exists columns explicitly (#12978)

2026-09-24 13:15:32 +00:00

metertelemetryschema

refactor(querier): 3-layer per-signal query architecture (#12304)

2026-07-29 09:24:08 +00:00

metricstelemetryschema

chore(querybuilder): compile every signal through one storage contract (#12802)

2026-09-15 11:36:06 +00:00

tracestelemetryschema

feat(traces-qb): gate JSON span attribute reads behind a feature flag (#12966)

2026-10-01 10:21:10 +00:00