feat: define Seriatim role contract

defaults/main.yml

@@ -0,0 +1,16 @@
+---
+seriatim_version: v1.5.0
+seriatim_repository_url: https://gitea.maximumdirect.net/eric/seriatim.git
+seriatim_source_ref: "{{ seriatim_version }}"
+seriatim_build_version: "{{ seriatim_version }}"
+seriatim_source_dir: /usr/local/src/seriatim
+seriatim_binary_path: /usr/local/bin/seriatim
+seriatim_build_state_dir: /usr/local/src/seriatim.ansible-build-state
+seriatim_manage_build_dependencies: true
+seriatim_go_snap_channel: 1.26/stable
+seriatim_go_binary: /snap/bin/go
+seriatim_go_build_flags:
+  - -trimpath
+seriatim_go_ldflags: >-
+  -s -w -X gitea.maximumdirect.net/eric/seriatim/internal/buildinfo.Version={{ seriatim_build_version }}
+seriatim_go_package: ./cmd/seriatim