refactor(agents): migrate console.warn/error/info to subsystem logger (#22906)

Merged via /review-pr -> /prepare-pr -> /merge-pr.

Prepared head SHA: a806c4cb27
Co-authored-by: Kepler2024 <166882517+Kepler2024@users.noreply.github.com>
Co-authored-by: gumadeiras <5599352+gumadeiras@users.noreply.github.com>
Reviewed-by: @gumadeiras

src/agents/compaction.ts

@@ -2,9 +2,12 @@ import type { AgentMessage } from "@mariozechner/pi-agent-core";
 import type { ExtensionContext } from "@mariozechner/pi-coding-agent";
 import { estimateTokens, generateSummary } from "@mariozechner/pi-coding-agent";
 import { retryAsync } from "../infra/retry.js";
+import { createSubsystemLogger } from "../logging/subsystem.js";
 import { DEFAULT_CONTEXT_TOKENS } from "./defaults.js";
 import { repairToolUseResultPairing, stripToolResultDetails } from "./session-transcript-repair.js";
 
+const log = createSubsystemLogger("compaction");
+
 export const BASE_CHUNK_RATIO = 0.4;
 export const MIN_CHUNK_RATIO = 0.15;
 export const SAFETY_MARGIN = 1.2; // 20% buffer for estimateTokens() inaccuracy
@@ -219,7 +222,7 @@ export async function summarizeWithFallback(params: {
   try {
     return await summarizeChunks(params);
   } catch (fullError) {
-    console.warn(
+    log.warn(
       `Full summarization failed, trying partial: ${
         fullError instanceof Error ? fullError.message : String(fullError)
       }`,
@@ -251,7 +254,7 @@ export async function summarizeWithFallback(params: {
       const notes = oversizedNotes.length > 0 ? `\n\n${oversizedNotes.join("\n")}` : "";
       return partialSummary + notes;
     } catch (partialError) {
-      console.warn(
+      log.warn(
         `Partial summarization also failed: ${
           partialError instanceof Error ? partialError.message : String(partialError)
         }`,