chore: bump devx from v0.51.0 to v0.51.9

Picks up DEVX-165 (deps: commit type) and DEVX-166 (docs/plans/* exclusion).

Implements: GRM-168

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

docs/specs/GRM-168.md

@@ -0,0 +1,21 @@
+# GRM-168: Bump devx to v0.51.9
+
+## Problem
+grm pins devx@v0.51.0 which rejects `deps:` as a conventional commit type,
+causing post-merge CI failures on dependency bump commits.
+
+## Approach
+REQ-1: Bump devx from v0.51.0 to v0.51.9 in pyproject.toml
+
+## Test Plan
+- `make lint-all` passes
+- `make pytest-cov` passes
+
+## Deploy Plan
+- Merge to master
+
+## Rollback Plan
+- Revert the merge commit
+
+## Acceptance Criteria
+- [x] REQ-1: Bump devx from v0.51.0 to v0.51.9 in pyproject.toml

pyproject.toml

@@ -36,7 +36,7 @@ ci = [
     "build==1.5.1",
     "twine==6.2.0",
     # Reusable CI/CD and dev tools (auto-merge, pr-review, pre-push checks, etc.)
-    "devx @ git+https://git.oblachno.oblachno.fyi/oblachno-oss/devx.git@v0.51.0",
+    "devx @ git+https://git.oblachno.oblachno.fyi/oblachno-oss/devx.git@v0.51.9",
 ]
 # Lint and type-checking tools (validate job)
 lint = [
@@ -56,7 +56,7 @@ molecule = [
 dev = [
     "grm[ci,lint,molecule]",
     # Reusable CI/CD and dev tools (pre-push hooks, create-task, create-pr)
-    "devx @ git+https://git.oblachno.oblachno.fyi/oblachno-oss/devx.git@v0.51.0",
+    "devx @ git+https://git.oblachno.oblachno.fyi/oblachno-oss/devx.git@v0.51.9",
     # Non-Python dev dependency: checkmake (Makefile linter)
     # Install via: go install github.com/checkmake/checkmake/cmd/checkmake@latest
 ]