Development: fix unreachable code around assertRaises blocks (#11365)

* tests: general cleanup and fixes for runnning under docker

This now allows tests to be run under a locally built or production
docker image with something like:

  `docker run --rm -v $PWD:/usr/src/paperless --entrypoint=bash paperlessngx/paperless-ngx:latest -c "uv run pytest"`

Specific fixes:
- fix unreachable code around `assertRaises` blocks
- fix `assertInt` typos
- fix `str(e)` vs `str(e.exception)` issues
- skip permission-based checks when root (in a docker container)
- catch `OSError` problems when instantiating `INotify` and
  skip inotify-based tests when it's unavailable.

* Reverts most files to dev while keeping the exception assert fixes

---------

Co-authored-by: Trenton H <797416+stumpylog@users.noreply.github.com>

src/documents/tests/test_management_exporter.py

@@ -571,7 +571,7 @@ class TestExportImport(
         with self.assertRaises(CommandError) as e:
             call_command(*args)
 
-            self.assertEqual("That path isn't a directory", str(e))
+        self.assertEqual("That path doesn't exist", str(e.exception))
 
     def test_export_target_exists_but_is_file(self):
         """
@@ -589,7 +589,7 @@ class TestExportImport(
             with self.assertRaises(CommandError) as e:
                 call_command(*args)
 
-                self.assertEqual("That path isn't a directory", str(e))
+            self.assertEqual("That path isn't a directory", str(e.exception))
 
     def test_export_target_not_writable(self):
         """
@@ -608,7 +608,10 @@ class TestExportImport(
             with self.assertRaises(CommandError) as e:
                 call_command(*args)
 
-                self.assertEqual("That path doesn't appear to be writable", str(e))
+            self.assertEqual(
+                "That path doesn't appear to be writable",
+                str(e.exception),
+            )
 
     def test_no_archive(self):
         """

src/documents/tests/test_management_fuzzy.py

@@ -34,7 +34,7 @@ class TestFuzzyMatchCommand(TestCase):
         """
         with self.assertRaises(CommandError) as e:
             self.call_command("--ratio", "-1")
-            self.assertIn("The ratio must be between 0 and 100", str(e))
+        self.assertIn("The ratio must be between 0 and 100", str(e.exception))
 
     def test_invalid_ratio_upper_limit(self):
         """
@@ -47,7 +47,7 @@ class TestFuzzyMatchCommand(TestCase):
         """
         with self.assertRaises(CommandError) as e:
             self.call_command("--ratio", "101")
-            self.assertIn("The ratio must be between 0 and 100", str(e))
+        self.assertIn("The ratio must be between 0 and 100", str(e.exception))
 
     def test_invalid_process_count(self):
         """
@@ -60,7 +60,7 @@ class TestFuzzyMatchCommand(TestCase):
         """
         with self.assertRaises(CommandError) as e:
             self.call_command("--processes", "0")
-            self.assertIn("There must be at least 1 process", str(e))
+        self.assertIn("There must be at least 1 process", str(e.exception))
 
     def test_no_matches(self):
         """

src/documents/tests/test_management_importer.py

@@ -42,7 +42,7 @@ class TestCommandImport(
             )
         self.assertIn(
             "That directory doesn't appear to contain a manifest.json file.",
-                str(e),
+            str(e.exception),
         )
 
     def test_check_manifest_malformed(self):
@@ -68,7 +68,7 @@ class TestCommandImport(
             )
         self.assertIn(
             "The manifest file contains a record which does not refer to an actual document file.",
-                str(e),
+            str(e.exception),
         )
 
     def test_check_manifest_file_not_found(self):
@@ -95,7 +95,7 @@ class TestCommandImport(
                 "--no-progress-bar",
                 str(self.dirs.scratch_dir),
             )
-            self.assertIn('The manifest file refers to "noexist.pdf"', str(e))
+        self.assertIn('The manifest file refers to "noexist.pdf"', str(e.exception))
 
     def test_import_permission_error(self):
         """
@@ -129,14 +129,14 @@ class TestCommandImport(
             cmd.data_only = False
             with self.assertRaises(CommandError) as cm:
                 cmd.check_manifest_validity()
-                self.assertInt("Failed to read from original file", str(cm.exception))
+            self.assertIn("Failed to read from original file", str(cm.exception))
 
             original_path.chmod(0o444)
             archive_path.chmod(0o222)
 
             with self.assertRaises(CommandError) as cm:
                 cmd.check_manifest_validity()
-                self.assertInt("Failed to read from archive file", str(cm.exception))
+            self.assertIn("Failed to read from archive file", str(cm.exception))
 
     def test_import_source_not_existing(self):
         """
@@ -149,7 +149,7 @@ class TestCommandImport(
         """
         with self.assertRaises(CommandError) as cm:
             call_command("document_importer", Path("/tmp/notapath"))
-            self.assertInt("That path doesn't exist", str(cm.exception))
+        self.assertIn("That path doesn't exist", str(cm.exception))
 
     def test_import_source_not_readable(self):
         """
@@ -165,7 +165,7 @@ class TestCommandImport(
             path.chmod(0o222)
             with self.assertRaises(CommandError) as cm:
                 call_command("document_importer", path)
-                self.assertInt(
+            self.assertIn(
                 "That path doesn't appear to be readable",
                 str(cm.exception),
             )
@@ -185,8 +185,7 @@ class TestCommandImport(
 
         with self.assertRaises(CommandError) as e:
             call_command("document_importer", "--no-progress-bar", str(path))
-
+        self.assertIn("That path doesn't exist", str(e.exception))
-            self.assertIn("That path doesn't exist", str(e))
 
     def test_import_files_exist(self):
         """