docs: reorganize tree, restore architecture + research from archive, add Phase 0 reports

Active docs/ was stub scaffolding while the real docs sat in docs/_archive/.
Restore and correct them, and record the Phase 0 work.

- docs/architecture/current.md: verified system map (from archived SYSTEM_OVERVIEW,
  9 corrections against code).
- docs/research/competitors.md: sourced competitor analysis (from archived
  PRODUCT_RESEARCH, feature matrix corrected).
- docs/decisions/ADR-002-job-application-model.md: the Job/JobApplication split.
- docs/application-discovery-report.md, docs/implementation-roadmap.md,
  docs/phase-0-foundation-report.md, docs/career-workspace-branch-assessment.md.
- Remove 10 zero-byte placeholder files that advertised content that never existed.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docs/technical/git-workflow.md

@@ -0,0 +1,53 @@
+# Git Workflow
+
+## Branches
+
+Use feature branches.
+
+Examples:
+
+feature/cv-builder-themes
+
+feature/google-auth
+
+fix/pdf-parser
+
+---
+
+# Commits
+
+Commits should:
+
+- Describe the change.
+- Be focused.
+- Be reviewable.
+
+---
+
+# Commit Style
+
+Examples:
+
+feat: add CV theme selector
+
+fix: correct PDF extraction
+
+refactor: extract AI service
+
+docs: update architecture
+
+---
+
+# Before Commit
+
+Check:
+
+- Tests pass.
+- Build succeeds.
+- No secrets included.
+
+---
+
+# Deployment
+
+Do not deploy untested breaking changes.