fix(autoplan): Phase 4 task aggregator emitted zero tasks on every run (#2018)

The branch+commit jq filter piped to the split commit array and then
referenced .commit — jq rebinds context across a pipe, so .commit indexed
the ARRAY with a string, every input line errored into 2>/dev/null, and
|| true swallowed the exit. The aggregate table has been empty for every
user since the feature shipped. Bind .commit to a variable before the pipe.

Functional pin extracts the ACTUAL emitted jq program from the resolver and
runs it against fixture JSONL (verified RED against the broken filter), plus
a source-shape guard against reintroducing a context-rebinding reference.

Fix mechanism from time-attack/gstack (GStack 2).

Co-authored-by: Sina Matian <sina@time-attack.dev>
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

scripts/resolvers/tasks-section.ts

@@ -118,8 +118,12 @@ if command -v jq >/dev/null 2>&1; then
       # Filter to current branch + recent commits, then keep records for the
       # latest run_id only. (Single phase may have multiple files if the user
       # re-ran the review; aggregator takes the newest.)
+      # .commit must be bound BEFORE piping to the split commit array: a
+      # pipe rebinds jq's context, so a bare .commit after it indexes the
+      # ARRAY with a string, every line errors into 2>/dev/null, and the
+      # aggregate is empty forever — the #2018 zero-tasks bug.
       jq -c --arg branch "$BRANCH" --arg commits "$COMMITS_RECENT" \\
-        'select(.branch == $branch and ($commits | split("|") | index(.commit) != null))' \\
+        '.commit as $c | select(.branch == $branch and ($commits | split("|") | index($c) != null))' \\
         "$f" 2>/dev/null >> "$ALL_JSONL" || true
     done < <(find "$TASKS_DIR" -maxdepth 1 -name "tasks-$phase-*.jsonl" 2>/dev/null | sort)
     # Reduce to latest run_id per phase