docs: add fleet change log 2026-05-27 (ansible branch consolidation), add PRD status tracker

changelog/2026-05-27-ansible-branch-consolidation.md

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+# Fleet Operations Change Log
+
+## 2026-05-27 — Ansible Pull Branch Consolidation
+
+### Event
+Fleet-wide ansible-pull-deploy repository consolidated from dual-branch (`master` + `main`) to single canonical `main` branch. All nodes updated to pull from `main`.
+
+### Root Cause
+- `master` and `main` had diverged by 3 commits
+- Swarm worker host_vars (mk-33, mk-34, mk-39, mk-42) existed only on `main`
+- Systemd-based G9 nodes (MK33/34/39/42) were pulling `master` — would fail on next run since `master` was stale and missing swarm configs
+- README still showed decommissioned `bones.yml` and non-existent `roles/common/` structure
+
+### Actions Taken
+1. Merged `master` → `main` (already up-to-date, `main` was ahead)
+2. Deleted `master` branch locally and on Gitea remote
+3. Removed `host_vars/bones.yml` (Bones decommissioned)
+4. Updated `README.md` with accurate 11-node fleet map
+5. Fixed `ansible-pull.service` and `ansible-pull-fixed.service` to clone/pull `main` branch
+6. Updated Artemis local repo (`/var/lib/ansible/local`) to latest `main`
+7. Rolled out service fix to MK33/34/39/42 via SSH
+8. Pruned stale `origin/master` refs from all 4 nodes
+
+### Fleet State After Fix
+
+| Node | Mechanism | Branch | Status |
+|------|-----------|--------|--------|
+| Artemis | cron | `main` | ✅ synced |
+| MK7 | cron | `main` | ✅ already correct |
+| MK33 | systemd | `main` | ✅ fixed + pruned |
+| MK34 | systemd | `main` | ✅ fixed + pruned |
+| MK39 | systemd | `main` | ✅ fixed + pruned |
+| MK42 | systemd | `main` | ✅ fixed + pruned |
+| Neo | cron | `main` | ✅ already correct |
+| Cinnamint | cron | `main` | ✅ already correct |
+| Mark5 | cron | `main` | ✅ already correct |
+| Shield | cron | `main` | ✅ already correct |
+| MK44 | powered off | — | N/A |
+
+### Commits
+- `75de374` — fix: consolidate under main branch, remove bones.yml, update README fleet map, fix service files to pull main
+
+---
+
+*Logged by Artemis. Next update: PRD Chunk2 completion.*