Preserve stopped-tool status and streaming fixtures after main rebase

Assistant-model: GPT-6.1 Sol (fast)
Assistant-workflow: inline
Assistant-duration: 7m47s converged, estimated unmeasured
Assistant-verification: bun install passed: workspace dependencies installed with Bun 1.4.2
Assistant-verification: bun run fix passed: initial, debugger, and final runs; 10 warnings, 0 errors; only intended source changes
Assistant-verification: bun run types passed: initial and final workspace and E2E checks
Assistant-verification: bun test failed: initial full run 3964 pass, 3 skip, 31 fail; 29 temporary Git fixture signing failures and 2 stopped-question status regressions
Assistant-verification: bun test focused failed: stuck-turn.test.ts reproduced 0 pass, 2 fail before the aborted own-end callback guard
Assistant-verification: bun test focused passed: stuck-turn.test.ts 2 pass after fix; stuck-turn/service/invoke/agents/session/planner-lifecycle-durability suites 74 pass, 0 fail
Assistant-verification: bun test passed: final full run with command-scoped GIT_CONFIG_COUNT=1 GIT_CONFIG_KEY_0=commit.gpgsign GIT_CONFIG_VALUE_0=false; 3995 pass, 3 PostgreSQL skips, 0 fail; no persistent Git config changes
Assistant-verification: bun run ci passed: initial and final dprint, oxlint, tokens, design contract, design record, Impeccable; 10 warnings, 0 errors, no new design findings
Assistant-verification: playwright E2E failed: initial bun run e2e e2e/harness.e2e.ts e2e/smoke.e2e.ts e2e/responsive-activity.e2e.ts; 30 pass, 2 obsolete composer locator failures
Assistant-verification: playwright E2E passed: final identical command rebuilt client and migrated four disposable PostgreSQL services; 32 pass, 0 fail; requested ports had no stale listeners before either run
Assistant-verification: git passed: diff --check, origin/main is ancestor, and no apps/web diff against origin/main
User-preference: Keep both sides of rebase intent and tests; do not change apps/web or the PR title/body, and keep the active gh account unchanged
User-preference: Push only with git push --force-with-lease origin planner-live-streaming; never push to main
User-preference: Every subagent must run on a -fast model
Co-authored-by: Alex Lavaee <lavaman131@github.com>