feat(Logs): add missing OpenTelemetry log fields to enhance compliance and debugging

Internal/Roadmap/Logs.md

@@ -19,6 +19,7 @@ The following features have been implemented and removed from this plan:
 - **Phase 2.1** - Saved Views (LogSavedView model, SavedViewsDropdown, CRUD API)
 - **Phase 2.2** - Log Analytics View (LogsAnalyticsView with timeseries, toplist, table charts; analytics endpoint)
 - **Phase 2.3** - Column Customization (ColumnSelector with dynamic columns from log attributes)
+- **Phase 5.8** - Store Missing OpenTelemetry Log Fields (observedTimeUnixNano, droppedAttributesCount, flags columns + ingestion + migration)
 
 ## Gap Analysis Summary
 
@@ -197,42 +198,17 @@ These optimizations address fundamental storage and indexing gaps in the telemet
 - `Common/Server/Utils/AnalyticsDatabase/StatementGenerator.ts` (emit PROJECTION clause)
 - `Worker/DataMigrations/` (new migration to materialize)
 
-### 5.8 Store Missing OpenTelemetry Log Fields (Low)
-
-**Current**: Several standard OTEL log record fields are dropped during ingestion:
-- `observedTimeUnixNano` — when the log was collected by the pipeline (useful for measuring ingestion lag)
-- `droppedAttributesCount` — signals data loss during collection
-- `flags` — log record flags (e.g., W3C trace flags)
-
-**Target**: Preserve these fields for full OTEL compliance and operational debugging.
-
-**Implementation**:
-
-- Add optional columns to the Log model:
-  - `observedTimeUnixNano` (LongNumber)
-  - `droppedAttributesCount` (Number, default 0)
-  - `flags` (Number, default 0)
-- Update `OtelLogsIngestService.processLogsAsync()` to extract and store these fields
-- Migration to add columns to existing table
-
-**Files to modify**:
-- `Common/Models/AnalyticsModels/Log.ts` (add columns)
-- `Telemetry/Services/OtelLogsIngestService.ts` (extract additional fields)
-- `Worker/DataMigrations/` (new migration)
-
 ### 5.x Remaining Performance Impact Summary
 
 | Optimization | Query Pattern Improved | Expected Speedup | Effort |
 |-------------|----------------------|-------------------|--------|
 | 5.3 DateTime64 time column | Sub-second log ordering | Correctness fix | Medium |
 | 5.7 Histogram projections | Histogram and severity aggregation | 5-10x | Medium |
-| 5.8 Missing OTEL fields | OTEL compliance | N/A (completeness) | Small |
 
 ### 5.x Recommended Remaining Order
 
 1. **5.3** — DateTime64 upgrade (correctness)
 2. **5.7** — Projections (performance polish)
-3. **5.8** — Missing OTEL fields (completeness)
 
 ---