Initialize GovOPlaN module seed

docs/CONTRACTS_DOMAIN_BOUNDARY.md

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+# Contracts Domain Boundary
+
+## Purpose
+
+Contract register for renewals, obligations, responsible units, documents, sign-off chains, and vendor or partner references.
+
+## Owns
+
+- contract register
+- renewal reminders
+- obligation tracking
+- responsible-unit assignment
+- sign-off chain references
+- vendor and partner links
+
+## Does Not Own
+
+- procurement request execution
+- document storage
+- payment scheduling
+
+## Integration Candidates
+
+- procurement
+- approvals
+- files
+- records
+- notifications
+- ledger
+
+## 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 contract record, party, renewal, obligation, responsible unit, and document reference concepts.