Initialize GovOPlaN module seed

docs/APPROVALS_DOMAIN_BOUNDARY.md

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+# Approvals Domain Boundary
+
+## Purpose
+
+Generic approval and sign-off chains with delegation, substitution, four-eyes principle, escalation, and signatures.
+
+## Owns
+
+- approval requests
+- sign-off chains
+- delegation and substitution facts
+- four-eyes constraints
+- escalation state
+- signature references
+
+## Does Not Own
+
+- module-specific business decisions
+- workflow orchestration engine
+- identity and RBAC primitives
+
+## Integration Candidates
+
+- workflow
+- audit
+- files
+- notifications
+
+## Seed State
+
+The current repository state is intentionally small:
+
+- module manifest and entry point
+- tenant-level permission definitions
+- manager and viewer role templates
+- documentation topic describing the module boundary
+- Gitea issue workflow templates
+- manifest contract test
+
+No runtime API, database model, migration, WebUI route, or navigation item is registered yet. The first implementation slice should preserve the boundary above and only add user-visible surfaces once the workflow model is clear.
+
+## First Implementation Slice
+
+Define reusable approval request, step, actor, delegation, substitution, and decision result contracts for consuming modules.