feat: replace php migration with django migration

- keep latest legacy version in initial migration file
- move propel schema to api legacy app
- remove legacy upgrade tool

api/libretime_api/legacy/migrations/_version.py

@@ -0,0 +1,38 @@
+import re
+
+VERSION_RE = re.compile(
+    r"""
+    (?P<release>[0-9]+(?:\.[0-9]+)*)
+    (?:
+        -(?P<pre_l>(alpha|beta))
+        (?:
+            \.(?P<pre_n>[0-9]+
+                (?:
+                    \.[0-9]+
+                )?
+            )
+        )?
+    )?
+    """,
+    re.VERBOSE | re.IGNORECASE,
+)
+
+
+def parse_version(version: str):
+    match = VERSION_RE.search(version)
+    if not match:
+        raise Exception(f"invalid version {version}")
+
+    major, minor, patch = map(int, match.group("release").split("."))
+
+    pre_mapping = {"alpha": -2, "beta": -1, None: 0, "": 0}
+    pre = pre_mapping[match.group("pre_l")]
+
+    pre_major, pre_minor = 0, 0
+    pre_version = match.group("pre_n")
+    if pre_version:
+        pre_version_list = pre_version.split(".")
+        pre_major = int(pre_version_list.pop(0)) if len(pre_version_list) else 0
+        pre_minor = int(pre_version_list.pop(0)) if len(pre_version_list) else 0
+
+    return (major, minor, patch, pre, pre_major, pre_minor)