feat: Add self-contained orchestration templates and guide

Makes Mosaic Stack self-contained for orchestration - no external dependencies.

New files:
- docs/claude/orchestrator.md - Platform-specific orchestrator protocol
- docs/templates/ - Bootstrap templates for tasks.md, learnings, reports

Templates:
- orchestrator/tasks.md.template - Task tracking scaffold
- orchestrator/orchestrator-learnings.json.template - Variance tracking
- orchestrator/orchestrator-learnings.schema.md - JSON schema docs
- orchestrator/phase-issue-body.md.template - Gitea issue body
- orchestrator/compaction-summary.md.template - 60% checkpoint format
- reports/review-report-scaffold.sh - Creates report directory
- scratchpad.md.template - Per-task working document

Updated CLAUDE.md:
- References local docs/claude/orchestrator.md instead of ~/.claude/
- Added Platform Templates section pointing to docs/templates/

This enables deployment without requiring user-level ~/.claude/ configuration.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CLAUDE.md

@@ -5,11 +5,15 @@ integration.**
 
 | When working on...                       | Load this guide                                                     |
 | ---------------------------------------- | ------------------------------------------------------------------- |
-| Orchestrating autonomous task completion | `~/.claude/agent-guides/orchestrator.md`                            |
+| Orchestrating autonomous task completion | `docs/claude/orchestrator.md`                                       |
 | Security remediation (review findings)   | `docs/reports/codebase-review-2026-02-05/01-security-review.md`     |
 | Code quality fixes                       | `docs/reports/codebase-review-2026-02-05/02-code-quality-review.md` |
 | Test coverage gaps                       | `docs/reports/codebase-review-2026-02-05/03-qa-test-coverage.md`    |
 
+## Platform Templates
+
+Bootstrap templates are at `docs/templates/`. See `docs/templates/README.md` for usage.
+
 ## Project Overview
 
 Mosaic Stack is a standalone platform that provides: