Grow journal: time-stamped notes on gardens, beds and plantings (#52) (#65)

Co-authored-by: Steve Dudenhoeffer <[email protected]>

internal/domain/domain.go

@@ -165,6 +165,32 @@ type Revision struct {
 	After       *string `json:"after,omitempty"`
 }
 
+// JournalEntry is one time-stamped observation: what happened, and when.
+// Distinct from the mutable `notes` on a garden/object/plant, which says what
+// the thing IS — writing a new note overwrites the old one, while entries
+// accumulate.
+//
+// GardenID is set even when the entry is about a bed or a plop, so permission
+// checks reuse the garden role machinery unchanged; ObjectID/PlantingID narrow
+// the target without inventing a second ACL path.
+type JournalEntry struct {
+	ID         int64  `json:"id"`
+	GardenID   int64  `json:"gardenId"`
+	ObjectID   *int64 `json:"objectId,omitempty"`
+	PlantingID *int64 `json:"plantingId,omitempty"`
+	AuthorID   int64  `json:"authorId"`
+	Body       string `json:"body"`
+	// ObservedAt is when it happened ('YYYY-MM-DD'), which is not when it was
+	// written down: you write up Saturday's observations on Sunday.
+	ObservedAt string `json:"observedAt"`
+	Version    int64  `json:"version"`
+	CreatedAt  string `json:"createdAt"`
+	UpdatedAt  string `json:"updatedAt"`
+
+	// AuthorName is resolved for display by the service, never persisted.
+	AuthorName string `json:"authorName,omitempty"`
+}
+
 // RevertConflict reports one entity a revert deliberately left alone, because
 // reverting it would have discarded a change made after the change set being
 // reverted. The rest of the change set still reverts.