fix(ci): retry Vikunja lookups and surface self-approval merge failures

Implements: DEVX-164 REQ-1..3

- get_vikunja_task_title retries list_project_tasks up to 4 attempts
  with backoff on APIError/RequestException — a Vikunja restart window
  (404/502) no longer strands an otherwise-valid PR
- merge HTTP 405 now fetches PR reviews and, when no APPROVED review
  exists, explains the same-user self-approval rejection and the
  remediation (approve via a non-author account)
- regression tests for retry-then-success, retry exhaustion, missing
  task, and all three 405 review states

CHANGELOG.md

@@ -2,12 +2,6 @@
 
 All notable changes to this project will be documented in this file.
 
-## [0.51.11] - 2026-09-19
-
-### Bug Fixes
-
-- *(ci)* Retry Vikunja lookups and surface self-approval merge failures
-
 ## [0.51.10] - 2026-09-17
 
 ### Bug Fixes

README.md

@@ -87,7 +87,7 @@ extra index and list devx in your dependencies:
 ```toml
 [project]
 dependencies = [
-    "devx>=0.51.11",
+    "devx>=0.51.10",
 ]
 
 [tool.pip]
@@ -101,8 +101,8 @@ pip install -e .
 ```
 
 > **Note:** If your project requires a specific devx version, pin it in
-> `dependencies` (for example, `"devx==0.51.11"`) or use a version constraint
-> (for example, `"devx>=0.51.11,<0.52"`).
+> `dependencies` (for example, `"devx==0.51.10"`) or use a version constraint
+> (for example, `"devx>=0.51.10,<0.52"`).
 
 ### Optional extras
 

docs/index.md

@@ -74,14 +74,14 @@ Add devx to your `pyproject.toml` dependencies and configure the registry:
 ```toml
 [project]
 dependencies = [
-    "devx>=0.51.11",
+    "devx>=0.51.10",
 ]
 
 [tool.pip]
 extra-index-url = "https://git.oblachno.oblachno.fyi/api/packages/oblachno-oss/pypi/simple"
 ```
 
-Pin a specific version if needed: `"devx==0.51.11"` or `"devx>=0.51.11,<0.52"`.
+Pin a specific version if needed: `"devx==0.51.10"` or `"devx>=0.51.10,<0.52"`.
 
 ### Optional extras
 

docs/user/getting-started.md

@@ -48,12 +48,12 @@ Add devx to your `pyproject.toml`:
 ```toml
 [project]
 dependencies = [
-    "devx>=0.51.11",
+    "devx>=0.51.10",
 ]
 
 [project.optional-dependencies]
 dev = [
-    "devx>=0.51.11",
+    "devx>=0.51.10",
 ]
 ```
 

src/devx/__init__.py

@@ -6,4 +6,4 @@ create_dependency_pr, auto_merge, release, publish), developer tooling
 molecule testing helpers for Ansible projects.
 """
 
-__version__ = "0.51.11"
+__version__ = "0.51.10"