persona-wire-core 0.3.0

persona-wire core: Domain (Graph + Specification + Compute + Constraint + AutoVersion + CRUD) + Application (NamedProjection registry, Use Case) + Infrastructure (SQLite storage, Rendering adapter). Transport-agnostic.
Documentation 
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//! AutoVersion primitive — append-only version chain with diff/rollback.
//!
//! Every update to a node/edge inserts a new row with incremented `version`
//! and `prev_id` pointing to the previous version. Latest row wins for default
//! reads; historical rows kept for diff/rollback.

use serde::{Deserialize, Serialize};

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct VersionRecord {
    pub target_kind: VersionTargetKind,
    pub target_id: String,
    pub version: u32,
    pub diff: serde_json::Value,
    pub ts: i64,
    pub author: Option<String>,
}

#[derive(Debug, Clone, Copy, Serialize, Deserialize, PartialEq, Eq)]
#[serde(rename_all = "lowercase")]
pub enum VersionTargetKind {
    Node,
    Edge,
}