initial arhitectural overhaul

Signed-off-by: Sienna Meridian Satterwhite <sienna@r3t.io>

crates/libmarathon/src/persistence/migrations/001_initial_schema.sql

@@ -0,0 +1,62 @@
+-- Migration 001: Initial schema
+-- Creates the base tables for entity persistence and CRDT sync
+
+-- Entities table - stores entity metadata
+CREATE TABLE IF NOT EXISTS entities (
+    id BLOB PRIMARY KEY,
+    entity_type TEXT NOT NULL,
+    created_at INTEGER NOT NULL,
+    updated_at INTEGER NOT NULL
+);
+
+-- Components table - stores serialized component data
+CREATE TABLE IF NOT EXISTS components (
+    entity_id BLOB NOT NULL,
+    component_type TEXT NOT NULL,
+    data BLOB NOT NULL,
+    updated_at INTEGER NOT NULL,
+    PRIMARY KEY (entity_id, component_type),
+    FOREIGN KEY (entity_id) REFERENCES entities(id) ON DELETE CASCADE
+);
+
+-- Index for querying components by entity
+CREATE INDEX IF NOT EXISTS idx_components_entity
+ON components(entity_id);
+
+-- Operation log - for CRDT sync protocol
+CREATE TABLE IF NOT EXISTS operation_log (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    node_id TEXT NOT NULL,
+    sequence_number INTEGER NOT NULL,
+    operation BLOB NOT NULL,
+    timestamp INTEGER NOT NULL,
+    UNIQUE(node_id, sequence_number)
+);
+
+-- Index for efficient operation log queries
+CREATE INDEX IF NOT EXISTS idx_oplog_node_seq
+ON operation_log(node_id, sequence_number);
+
+-- Vector clock table - for causality tracking
+CREATE TABLE IF NOT EXISTS vector_clock (
+    node_id TEXT PRIMARY KEY,
+    counter INTEGER NOT NULL,
+    updated_at INTEGER NOT NULL
+);
+
+-- Session state table - for crash detection
+CREATE TABLE IF NOT EXISTS session_state (
+    key TEXT PRIMARY KEY,
+    value TEXT NOT NULL,
+    updated_at INTEGER NOT NULL
+);
+
+-- WAL checkpoint tracking
+CREATE TABLE IF NOT EXISTS checkpoint_state (
+    last_checkpoint INTEGER NOT NULL,
+    wal_size_bytes INTEGER NOT NULL
+);
+
+-- Initialize checkpoint state if not exists
+INSERT OR IGNORE INTO checkpoint_state (rowid, last_checkpoint, wal_size_bytes)
+VALUES (1, strftime('%s', 'now'), 0);

crates/libmarathon/src/persistence/migrations/004_sessions.sql

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+-- Migration 004: Add session support
+-- Adds session tables and session-scopes existing tables
+
+-- Sessions table
+CREATE TABLE IF NOT EXISTS sessions (
+    id BLOB PRIMARY KEY,
+    code TEXT NOT NULL,
+    name TEXT,
+    created_at INTEGER NOT NULL,
+    last_active INTEGER NOT NULL,
+    entity_count INTEGER NOT NULL DEFAULT 0,
+    state TEXT NOT NULL,
+    secret BLOB,
+    UNIQUE(id),
+    UNIQUE(code)
+);
+
+-- Index for finding recent sessions
+CREATE INDEX IF NOT EXISTS idx_sessions_last_active
+ON sessions(last_active DESC);
+
+-- Session membership (which node was in which session)
+CREATE TABLE IF NOT EXISTS session_membership (
+    session_id BLOB NOT NULL,
+    node_id TEXT NOT NULL,
+    joined_at INTEGER NOT NULL,
+    left_at INTEGER,
+    PRIMARY KEY (session_id, node_id),
+    FOREIGN KEY (session_id) REFERENCES sessions(id) ON DELETE CASCADE
+);
+
+-- Add session_id to entities table
+ALTER TABLE entities ADD COLUMN session_id BLOB;
+
+-- Index for session-scoped entity queries
+CREATE INDEX IF NOT EXISTS idx_entities_session
+ON entities(session_id);
+
+-- Add session_id to vector_clock
+ALTER TABLE vector_clock ADD COLUMN session_id BLOB;
+
+-- Composite index for session + node lookups
+CREATE INDEX IF NOT EXISTS idx_vector_clock_session_node
+ON vector_clock(session_id, node_id);
+
+-- Add session_id to operation_log
+ALTER TABLE operation_log ADD COLUMN session_id BLOB;
+
+-- Index for session-scoped operation queries
+CREATE INDEX IF NOT EXISTS idx_operation_log_session
+ON operation_log(session_id, node_id, sequence_number);