fix: normalize pagination inputs to finite integers

Coerce offset/limit to finite integers via Number.isFinite and
Math.trunc before using them for slice and returning in metadata.
Prevents NaN, fractional, or infinite values from producing invalid
display ranges.

Co-Authored-By: Vijay Yadav <vijay@studentsucceed.com>

Author: VJ-yadav

packages/opencode/src/altimate/observability/tracing.ts

@@ -1002,8 +1002,10 @@ export class Trace {
     limit: number
   }> {
     const all = await Trace.listTraces(dir)
-    const offset = Math.max(0, options?.offset ?? 0)
-    const limit = Math.max(1, options?.limit ?? 20)
+    const rawOffset = options?.offset ?? 0
+    const rawLimit = options?.limit ?? 20
+    const offset = Number.isFinite(rawOffset) ? Math.max(0, Math.trunc(rawOffset)) : 0
+    const limit = Number.isFinite(rawLimit) ? Math.max(1, Math.trunc(rawLimit)) : 20
     return {
       traces: all.slice(offset, offset + limit),
       total: all.length,