docs: add development and release standards

docs/tasks/TEMPLATE.md

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+# Task NNN: Feature Name
+
+## Objective
+
+Describe the operational outcome.
+
+## Background
+
+Summarize relevant current behavior and dependencies.
+
+## Scope
+
+List exactly what is included.
+
+## API
+
+Define every route, request, response, permission, and status code.
+
+## Permissions
+
+Define capabilities and role assignments.
+
+## Domain Rules
+
+List invariants and lifecycle rules.
+
+## Architecture
+
+Preserve:
+
+```text
+Router -> Service -> Repository -> PostgreSQL
+```
+
+## Database and Migration
+
+Define schema changes, constraints, indexes, migration order, and downgrade behavior.
+
+## Events and History
+
+Define immutable events, sequence, actor, timestamp, and structured payload.
+
+## Models and Validation
+
+Define UUID, time, enum, normalization, length, and JSON requirements.
+
+## Repository Requirements
+
+Define focused query and locking behavior. Avoid N+1 queries and generic CRUD.
+
+## Service Requirements
+
+Define validation, workflow, transaction boundaries, and domain exceptions.
+
+## Router Requirements
+
+Define dependencies, exception mapping, and route-count constraints.
+
+## Error Behaviour
+
+Define 401, 403, 404, 409, 422, and any additional statuses.
+
+## Concurrency and Atomicity
+
+Describe races and database enforcement.
+
+## Tests
+
+Cover authorization, domain behavior, rollback, constraints, migrations, regressions, routing, and architecture audits.
+
+## Validation
+
+Run compilation, shell validation, focused and regression tests, migration lifecycle tests, disposable baseline, architecture audits, route audit, and `git diff --check`.
+
+## Documentation
+
+List required roadmap, release, API, or operator documentation.
+
+## Explicitly Out of Scope
+
+List adjacent features that must not be added.
+
+## Completion Report
+
+Report files, migration, routes, permissions, tests, validation, limitations, and final `git status --short`.
+
+Do not commit.
+Do not push.