docs(issue-10): create design documentation and detailed stage plans

Issue #10: Fix incremental deployment logic in unified workflow

Created comprehensive documentation structure:

Design:
- Problem statement and root cause analysis
- Solution overview (4-stage approach)
- Timeline: 1.5 days total

Stage Plans:
- Stage 1 (0.5d): Reproduce the Issue
  * Analyze production state
  * Review workflow artifacts
  * Attempt manual recovery
  * Reproduce incremental failure
  * Document failure mechanism

- Stage 2 (0.25d): Fix Build Target Logic
  * Make determination explicit
  * Remove ambiguous fallbacks
  * Add validation and error handling
  * Pattern matching for event types

- Stage 3 (0.25d): Enhance Merge Safety
  * Pre-merge validation
  * Post-merge integrity checks
  * Enhanced logging and warnings

- Stage 4 (0.5d): Test & Verify Fix
  * Full deployment test
  * Incremental deployment tests
  * Error handling validation
  * 24-hour production monitoring

Structure:
- design.md: High-level solution approach
- progress.md: Visual progress tracking (empty)
- 00X-stage.md: Detailed plan for each stage
- 00X-progress.md: Report for each stage (empty)

Ready for Stage 1 implementation.

Related: #10, Epic: #2

Author: InfoTech.io Bot

docs/proposals/10-fix-incremental-deployment-logic/001-progress.md

@@ -0,0 +1,30 @@
+# Stage 1 Progress Report: Reproduce the Issue
+
+**Status**: ó Planned
+**Started**: -
+**Completed**: -
+
+---
+
+## Summary
+
+Stage 1 not yet started.
+
+**Objective**: >A?@>8725AB8 ?@>1;5<C 4;O B>G=>9 4803=>AB8:8.
+
+---
+
+## Completed Steps
+
+None
+
+---
+
+## Next Steps
+
+- Begin Step 1.1: Analyze Current Production State
+- Follow detailed plan in `001-reproduce-issue.md`
+
+---
+
+**Last Updated**: 2025-11-02