docs(workflow): formalize gitflow process and templates

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,30 @@
+---
+name: Feature request
+about: Propose a new capability aligned with product milestones
+title: "[Feature] "
+labels: enhancement
+assignees: ""
+---
+
+## Problem
+
+What user or business problem are we solving?
+
+## Proposed Solution
+
+Describe the minimum viable implementation.
+
+## Scope
+
+- In scope:
+- Out of scope:
+
+## Acceptance Criteria
+
+- [ ]
+- [ ]
+
+## GitFlow Plan
+
+- Branch suggestion: `feature/<scope>-<short-description>`
+- Target milestone: