refactor: migrate to src/ package + add DinD-based E2E runner with debug artifacts

- Replace legacy standalone scripts with a proper src-layout Python package
  (baudolo backup/restore/configure entrypoints via pyproject.toml)
- Remove old scripts/files (backup-docker-to-local.py, recover-docker-from-local.sh,
  databases.csv.tpl, Todo.md)
- Add Dockerfile to build the project image for local/E2E usage
- Update Makefile: build image and run E2E via external runner script
- Add scripts/test-e2e.sh:
  - start DinD + dedicated network
  - recreate DinD data volume (and shared /tmp volume)
  - pre-pull helper images (alpine-rsync, alpine)
  - load local baudolo:local image into DinD
  - run unittest E2E suite inside DinD and abort on first failure
  - on failure: dump host+DinD diagnostics and archive shared /tmp into artifacts/
- Add artifacts/ debug outputs produced by failing E2E runs (logs, events, tmp archive)

https://chatgpt.com/share/694ec23f-0794-800f-9a59-8365bc80f435

artifacts/debug-host-20251226141235.txt

@@ -0,0 +1,121 @@
+=== Host docker version ===
+Client:
+ Version:           29.1.1
+ API version:       1.52
+ Go version:        go1.25.4 X:nodwarf5
+ Git commit:        0aedba58c2
+ Built:             Fri Nov 28 14:28:26 2025
+ OS/Arch:           linux/amd64
+ Context:           default
+
+Server:
+ Engine:
+  Version:          29.1.1
+  API version:      1.52 (minimum version 1.44)
+  Go version:       go1.25.4 X:nodwarf5
+  Git commit:       9a84135d52
+  Built:            Fri Nov 28 14:28:26 2025
+  OS/Arch:          linux/amd64
+  Experimental:     false
+ containerd:
+  Version:          v2.2.0
+  GitCommit:        1c4457e00facac03ce1d75f7b6777a7a851e5c41.m
+ runc:
+  Version:          1.4.0
+  GitCommit:        
+ docker-init:
+  Version:          0.19.0
+  GitCommit:        de40ad0
+
+=== Host docker info ===
+Client:
+ Version:    29.1.1
+ Context:    default
+ Debug Mode: false
+ Plugins:
+  compose: Docker Compose (Docker Inc.)
+    Version:  2.40.3
+    Path:     /usr/lib/docker/cli-plugins/docker-compose
+
+Server:
+ Containers: 18
+  Running: 17
+  Paused: 0
+  Stopped: 1
+ Images: 79
+ Server Version: 29.1.1
+ Storage Driver: overlay2
+  Backing Filesystem: extfs
+  Supports d_type: true
+  Using metacopy: true
+  Native Overlay Diff: false
+  userxattr: false
+ Logging Driver: json-file
+ Cgroup Driver: systemd
+ Cgroup Version: 2
+ Plugins:
+  Volume: local
+  Network: bridge host ipvlan macvlan null overlay
+  Log: awslogs fluentd gcplogs gelf journald json-file local splunk syslog
+ CDI spec directories:
+  /etc/cdi
+  /var/run/cdi
+ Swarm: inactive
+ Runtimes: runc io.containerd.runc.v2
+ Default Runtime: runc
+ Init Binary: docker-init
+ containerd version: 1c4457e00facac03ce1d75f7b6777a7a851e5c41.m
+ runc version: 
+ init version: de40ad0
+ Security Options:
+  apparmor
+  seccomp
+   Profile: builtin
+  cgroupns
+ Kernel Version: 6.12.62-1-MANJARO
+ Operating System: Manjaro Linux
+ OSType: linux
+ Architecture: x86_64
+ CPUs: 20
+ Total Memory: 62.5GiB
+ Name: msi-stealth-gs66
+ ID: f68c344d-ed27-440f-8f77-fb048e1a4ea4
+ Docker Root Dir: /var/lib/docker
+ Debug Mode: false
+ Experimental: false
+ Insecure Registries:
+  127.0.0.0/8
+  ::1/128
+ Live Restore Enabled: false
+ Firewall Backend: iptables
+
+
+=== DinD reachable? (docker -H tcp://127.0.0.1:2375 version) ===
+Client:
+ Version:           29.1.1
+ API version:       1.52
+ Go version:        go1.25.4 X:nodwarf5
+ Git commit:        0aedba58c2
+ Built:             Fri Nov 28 14:28:26 2025
+ OS/Arch:           linux/amd64
+ Context:           default
+
+Server: Docker Engine - Community
+ Engine:
+  Version:          29.1.3
+  API version:      1.52 (minimum version 1.44)
+  Go version:       go1.25.5
+  Git commit:       fbf3ed2
+  Built:            Fri Dec 12 14:51:14 2025
+  OS/Arch:          linux/amd64
+  Experimental:     false
+ containerd:
+  Version:          v2.2.0
+  GitCommit:        1c4457e00facac03ce1d75f7b6777a7a851e5c41
+ runc:
+  Version:          1.3.4
+  GitCommit:        v1.3.4-0-gd6d73eb
+ docker-init:
+  Version:          0.19.0
+  GitCommit:        de40ad0
+