fix: revert snapshot_dir, add laconic_so_branch, move kind ramdisk check

- Revert snapshot_dir to /srv/solana/snapshots — aria2c runs on the host
  where this is the direct zvol mount (always available), unlike
  /srv/kind/solana/snapshots which depends on the bind mount
- Add laconic_so_branch variable (default: main) and use it in both
  git reset commands so the branch can be overridden via -e
- Move "Verify ramdisk visible inside kind node" from preflight to after
  "Wait for deployment to exist" — the kind container may not exist
  during preflight after teardown

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

playbooks/biscayne-redeploy.yml

@@ -53,10 +53,11 @@
     stack_path: /srv/deployments/agave-stack/stack-orchestrator/stacks/agave
     laconic_so: /home/rix/.local/bin/laconic-so
     laconic_so_repo: /home/rix/stack-orchestrator
+    laconic_so_branch: main
     kind_cluster: laconic-70ce4c4b47e23b85
     k8s_namespace: "laconic-{{ kind_cluster }}"
     deployment_name: "{{ kind_cluster }}-deployment"
-    snapshot_dir: /srv/kind/solana/snapshots
+    snapshot_dir: /srv/solana/snapshots
     ledger_dir: /srv/solana/ledger
     accounts_dir: /srv/solana/ramdisk/accounts
     ramdisk_mount: /srv/solana/ramdisk
@@ -185,24 +186,12 @@
       changed_when: false
       tags: [deploy, preflight]
 
-    - name: Verify ramdisk visible inside kind node
-      ansible.builtin.shell:
-        cmd: >
-          set -o pipefail &&
-          docker exec {{ kind_cluster }}-control-plane
-          df -T /mnt/validator-accounts 2>/dev/null | grep -q xfs
-        executable: /bin/bash
-      register: kind_ramdisk_check
-      failed_when: kind_ramdisk_check.rc != 0
-      changed_when: false
-      tags: [deploy, preflight]
-
     # ---- deploy: sync config, bring up cluster, scale to 0 ------------------
     - name: Pull agave-stack repo
       ansible.builtin.shell: |
         cd {{ stack_repo }}
         git fetch origin
-        git reset --hard origin/main
+        git reset --hard origin/{{ laconic_so_branch }}
       changed_when: true
       tags: [deploy]
 
@@ -237,7 +226,7 @@
       ansible.builtin.shell: |
         cd {{ laconic_so_repo }}
         git fetch origin
-        git reset --hard origin/main
+        git reset --hard origin/{{ laconic_so_branch }}
       changed_when: true
       tags: [deploy]
 
@@ -280,6 +269,18 @@
       changed_when: false
       tags: [deploy]
 
+    - name: Verify ramdisk visible inside kind node
+      ansible.builtin.shell:
+        cmd: >
+          set -o pipefail &&
+          docker exec {{ kind_cluster }}-control-plane
+          df -T /mnt/validator-accounts 2>/dev/null | grep -q xfs
+        executable: /bin/bash
+      register: kind_ramdisk_check
+      failed_when: kind_ramdisk_check.rc != 0
+      changed_when: false
+      tags: [deploy]
+
     - name: Scale validator to 0 (stop before snapshot download)
       ansible.builtin.command: >
         kubectl scale deployment {{ deployment_name }}