feat(atlas): update resolvers and index for lineage-aware session resolution

- Update recent-model-resolver for session origin awareness
- Update resolve-active-boulder-session with lineage support
- Add comprehensive test coverage for boulder session resolution
- Add fallback tests for recent model resolver
- Update index tests for new lineage tracking

🤖 Generated with assistance of OhMyOpenCode

src/hooks/atlas/recent-model-resolver.ts

@@ -18,16 +18,25 @@ export async function resolveRecentPromptContextForSession(
   try {
     const messagesResp = await ctx.client.session.messages({ path: { id: sessionID } })
     const messages = normalizeSDKResponse(messagesResp, [] as Array<{
+      id?: string
       info?: {
         model?: ModelInfo
         modelID?: string
         providerID?: string
         tools?: Record<string, boolean | "allow" | "deny" | "ask">
+        time?: { created?: number }
       }
-    }>)
+    }>).sort((left, right) => {
+      const leftTime = left.info?.time?.created ?? Number.NEGATIVE_INFINITY
+      const rightTime = right.info?.time?.created ?? Number.NEGATIVE_INFINITY
+      if (leftTime !== rightTime) return rightTime - leftTime
+      const leftId = typeof left.id === "string" ? left.id : ""
+      const rightId = typeof right.id === "string" ? right.id : ""
+      return rightId.localeCompare(leftId)
+    })
 
-    for (let i = messages.length - 1; i >= 0; i--) {
-      const info = messages[i].info
+    for (const message of messages) {
+      const info = message.info
       const model = info?.model
       const tools = normalizePromptTools(info?.tools)
       if (model?.providerID && model?.modelID) {