refactor(drivers): organize backup modules into drivers subfolder

- Move all backup_*.py files to libtisbackup/drivers/ subdirectory
- Move XenAPI.py and copy_vm_xcp.py to drivers/ (driver-specific)
- Create drivers/__init__.py with automatic driver imports
- Update tisbackup.py imports to use new structure
- Add pyvmomi>=8.0.0 as mandatory dependency
- Sync requirements.txt with pyproject.toml dependencies
- Add pylint>=3.0.0 and pytest-cov>=6.0.0 to dev dependencies
- Configure pylint and coverage tools in pyproject.toml
- Add conventional commits guidelines to CLAUDE.md
- Enhance .gitignore with comprehensive patterns for Python, IDEs, testing, and secrets
- Update CLAUDE.md documentation with new structure and tooling

Breaking Changes:
- Drivers must now be imported from libtisbackup.drivers instead of libtisbackup
- All backup driver files relocated to drivers/ subdirectory

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

libtisbackup/drivers/backup_xcp_metadata.py

@@ -0,0 +1,101 @@
+#!/usr/bin/python3
+# -*- coding: utf-8 -*-
+# -----------------------------------------------------------------------
+#    This file is part of TISBackup
+#
+#    TISBackup is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation, either version 3 of the License, or
+#    (at your option) any later version.
+#
+#    TISBackup is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with TISBackup.  If not, see <http://www.gnu.org/licenses/>.
+#
+# -----------------------------------------------------------------------
+
+
+import paramiko
+
+from libtisbackup import *
+
+
+class backup_xcp_metadata(backup_generic):
+    """Backup metatdata of a xcp pool using xe pool-dump-database"""
+
+    type = "xcp-dump-metadata"
+    required_params = ["type", "server_name", "private_key", "backup_name"]
+
+    def do_backup(self, stats):
+        self.logger.debug("[%s] Connecting to %s with user root and key %s", self.backup_name, self.server_name, self.private_key)
+
+        t = datetime.datetime.now()
+        backup_start_date = t.strftime("%Y%m%d-%Hh%Mm%S")
+
+        # dump pool medatadata
+        localpath = os.path.join(self.backup_dir, "xcp_metadata-" + backup_start_date + ".dump")
+        stats["status"] = "Dumping"
+        if not self.dry_run:
+            cmd = "/opt/xensource/bin/xe pool-dump-database file-name="
+            self.logger.debug("[%s] Dump XCP Metadata : %s", self.backup_name, cmd)
+            (error_code, output) = ssh_exec(cmd, server_name=self.server_name, private_key=self.private_key, remote_user="root")
+
+            with open(localpath, "w") as f:
+                f.write(output)
+
+        # zip the file
+        stats["status"] = "Zipping"
+        cmd = "gzip %s " % localpath
+        self.logger.debug("[%s] Compress backup : %s", self.backup_name, cmd)
+        if not self.dry_run:
+            call_external_process(cmd)
+        localpath += ".gz"
+        if not self.dry_run:
+            stats["total_files_count"] = 1
+            stats["written_files_count"] = 1
+            stats["total_bytes"] = os.stat(localpath).st_size
+            stats["written_bytes"] = os.stat(localpath).st_size
+        stats["log"] = "gzip dump of DB %s:%s (%d bytes) to %s" % (self.server_name, "xcp metadata dump", stats["written_bytes"], localpath)
+        stats["backup_location"] = localpath
+        stats["status"] = "OK"
+
+    def register_existingbackups(self):
+        """scan metatdata backup files and insert stats in database"""
+
+        registered = [
+            b["backup_location"]
+            for b in self.dbstat.query("select distinct backup_location from stats where backup_name=?", (self.backup_name,))
+        ]
+
+        filelist = os.listdir(self.backup_dir)
+        filelist.sort()
+        p = re.compile(r"^%s-(?P<date>\d{8,8}-\d{2,2}h\d{2,2}m\d{2,2}).dump.gz$" % self.server_name)
+        for item in filelist:
+            sr = p.match(item)
+            if sr:
+                file_name = os.path.join(self.backup_dir, item)
+                start = datetime.datetime.strptime(sr.groups()[0], "%Y%m%d-%Hh%Mm%S").isoformat()
+                if file_name not in registered:
+                    self.logger.info("Registering %s from %s", file_name, fileisodate(file_name))
+                    size_bytes = int(os.popen('du -sb "%s"' % file_name).read().split("\t")[0])
+                    self.logger.debug("  Size in bytes : %i", size_bytes)
+                    if not self.dry_run:
+                        self.dbstat.add(
+                            self.backup_name,
+                            self.server_name,
+                            "",
+                            backup_start=start,
+                            backup_end=fileisodate(file_name),
+                            status="OK",
+                            total_bytes=size_bytes,
+                            backup_location=file_name,
+                        )
+                else:
+                    self.logger.info("Skipping %s from %s, already registered", file_name, fileisodate(file_name))
+
+
+register_driver(backup_xcp_metadata)