feat(block1): inventory walking skeleton + first quick-add slice

Stand up the Tanemaki monorepo and the first end-to-end vertical slice of
Block 1 (offline, encrypted inventory): add a seed → see it in a categorized,
searchable list → it persists → reopen and it's still there.

Architecture (state management like G1nkgo, adapted to Tane's reality):
- flutter_bloc (Cubit-first), but the encrypted Drift DB is the single source
  of truth; cubits stream from repositories (no hydrated_bloc/Hive, which would
  write plaintext at rest).
- get_it composition root; go_router; slang i18n (ES/EN, Weblate-friendly JSON).

Workspace & core:
- pub workspace: packages/commons_core (pure Dart) + apps/app_seeds (Flutter).
- commons_core primitives: UUIDv7 IdGen, Hybrid Logical Clock, Quantity value
  type (+ plant-aware QuantityKind), IdentityService root-seed stub.

Data & security:
- Drift schemaVersion=1 with all 10 Block-1 tables + common CRDT columns
  (HLC updated_at, last_author, tombstones); Movement append-only.
- SQLCipher via an injectable executor that refuses to open a plaintext DB;
  DB key + root seed in the OS keystore (separate secrets).
- Exported drift_schema_v1.json + migration scaffold.

Tests (near-TDD; nothing merges without tests):
- commons_core units (24), Drift migration test, "no plaintext at rest"
  security guard (runs where SQLCipher is present, skips otherwise),
  repository, widget, full quick-add flow, file-reopen persistence, and a
  no-hardcoded-strings i18n guard. GitLab CI: format + analyze + test + coverage.

Follow-on Block-1 stories (item detail/edit, species catalog, germination UI)
and all of Block 2 remain out of scope.

apps/app_seeds/lib/db/enums.dart

@@ -0,0 +1,27 @@
+// Domain enums stored by **name** (never by index) via Drift `textEnum`, so
+// the stored keys are stable across migrations. Per data-model §5.2, values
+// may only be appended, never renumbered or reused; when sync arrives, readers
+// must tolerate unknown values (map to a safe default). No sync yet in Block 1.
+
+/// Per-lot visibility (data-model §2.3). Used by the future sharing layer.
+enum OfferStatus { private, shared, exchange, sell }
+
+/// Append-only event kinds on a Lot (data-model §2.4).
+enum MovementType {
+  received,
+  given,
+  sown,
+  harvested,
+  germinationTest,
+  split,
+  discarded,
+}
+
+/// A counterparty is a person or a collective (data-model §2.5).
+enum PartyKind { person, collective }
+
+/// Attachment media kind (data-model §2.1).
+enum AttachmentKind { photo, doc }
+
+/// Polymorphic parent of an Attachment / ExternalLink.
+enum ParentType { variety, lot, movement }