Remove sync-branches workflow

[Copilot]

The sync-branches workflow is redundant since #36 made each iteration's Step 3 fast-forward or merge origin/main into the program's autoloop/* branch. Leaving it in is actively harmful: it fails to compile under strict mode (#33), silently no-ops without a PAT on most consumer repos, and reports green while doing nothing.

Changes

• Delete the workflow: workflows/sync-branches.md, .github/workflows/sync-branches.md, .github/workflows/sync-branches.lock.yml.
• install.md: drop gh aw compile sync-branches from Step 4 and the troubleshooting reference.
• AGENTS.md: remove from the repo tree and deploy steps; rewrite the "companion workflow" paragraph to point at per-iteration Step 3 (Branch Setup).
• README.md: remove from the repo-structure tree.
• workflows/autoloop.md (and its .github/workflows/ mirror): remove the "A sync workflow automatically merges..." bullet from the "How It Works" list.
• tests/test_scheduling.py: drop TestSyncBranchesCredentialOrdering (3 tests covering a workflow that no longer exists).

Migration for existing installs

Consumers who previously installed sync-branches should delete .github/workflows/sync-branches.md and .github/workflows/sync-branches.lock.yml from their repo on upgrade. No state to clean up. Worth calling out in release notes once #46 lands.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/repos/bogus.invalid/bogus/issues
  • Triggering command: /usr/bin/python /usr/bin/python /home/REDACTED/work/autoloop/autoloop/workflows/scripts/autoloop_scheduler.py -m owner --uid-owner 0 -j ACCEPT (http block)
  • Triggering command: /usr/bin/python /usr/bin/python /home/REDACTED/work/autoloop/autoloop/workflows/scripts/autoloop_scheduler.py -m conntrack --ctstate INVALID,NEW -j DROP (http block)
  • Triggering command: /usr/bin/python /usr/bin/python /home/REDACTED/work/autoloop/autoloop/workflows/scripts/autoloop_scheduler.py (http block)
• https://api.github.com/repos/bogus.invalid/bogus/pulls
  • Triggering command: /usr/bin/python /usr/bin/python /home/REDACTED/work/autoloop/autoloop/workflows/scripts/autoloop_scheduler.py -m owner --uid-owner 0 -j ACCEPT (http block)
  • Triggering command: /usr/bin/python /usr/bin/python /home/REDACTED/work/autoloop/autoloop/workflows/scripts/autoloop_scheduler.py -m conntrack --ctstate INVALID,NEW -j DROP (http block)
  • Triggering command: /usr/bin/python /usr/bin/python /home/REDACTED/work/autoloop/autoloop/workflows/scripts/autoloop_scheduler.py (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)