test: add E2E tests for autocomplete value suggestions feature (#11027)

Add Playwright E2E tests for the new autocomplete value suggestions
feature that persists field values in IndexedDB and shows them when
typing `field =`.

Tests cover:
- IndexedDB capture from field expansion (Values API)
- IndexedDB capture from search results (marked as expected-to-fail due
to bug)
- Autocomplete suggestions for operators: =, !=, <>, >=, <=, IN, NOT IN,
LIKE
- Numeric value quoting (no quotes for numbers)
- TTL expiry filtering
- Stream/org isolation
- Traces page autocomplete

Note: One test marked as expected-to-fail due to BLOCKER BUG where
captureFromSearchHits() doesn't write to IndexedDB (schemaFields
filtering issue)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>
Co-authored-by: Neha P <undefined@users.noreply.github.com>

.github/workflows/playwright.yml

@@ -157,6 +157,7 @@ jobs:
                 "logsqueries.cte.spec.js",
                 "logsqueries.matchall.spec.js",
                 "searchpartition.spec.js",
+                "logs-autocomplete-suggestions.spec.js",
               ]
           - testfolder: "Alerts"
             browser: "chrome"
@@ -262,6 +263,7 @@ jobs:
                 "traceDetails.spec.js",
                 "traceAdvancedFiltering.spec.js",
                 "tracesAnalyzeDimensions.spec.js",
+                "traces-autocomplete-suggestions.spec.js",
               ]
 
           - testfolder: "RegressionSet"