M11 Architect Audit & Control Layer

Added:
- docs/00-start/START_HERE.md
- docs/governance/GEOINTEL_CONSTITUTION.md
- docs/governance/FORBIDDEN_DECISIONS.md
- docs/governance/ARCHITECTURE_INVARIANTS.md
- docs/governance/DECISION_PRECEDENCE.md
- docs/specs/CANONICAL_DOMAIN_MODELS.md
- docs/specs/GIS_STANDARDS.md
- docs/specs/RASTER_STANDARDS.md
- docs/specs/STATE_MACHINES.md
- docs/specs/DATA_LIFECYCLE.md
- docs/specs/ERROR_CATALOG.md
- docs/specs/PERFORMANCE_BUDGETS_CANONICAL.md
- docs/workflows/GOLDEN_PATHS.md
- docs/build/BUILD_ORDER_DEPENDENCY_GRAPH.md
- docs/build/CODEX_OPERATING_SYSTEM.md
- docs/19-architect-audit/ARCHITECT_AUDIT_REPORT_M11.md
- prompts/codex/M11_ARCHITECT_MASTER_PROMPT.md

Changed:
- README.md now points to the single canonical M11 start path.