feat: add compressed_size column to chunks table for CDC compression tracking

db/migrations/mysql/20260131021850_add_chunks.sql

@@ -3,6 +3,7 @@ CREATE TABLE chunks (
     id BIGINT AUTO_INCREMENT PRIMARY KEY,
     hash VARCHAR(64) NOT NULL UNIQUE,
     size INT UNSIGNED NOT NULL,
+    compressed_size INT UNSIGNED NOT NULL DEFAULT 0,
     created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
     updated_at TIMESTAMP NULL DEFAULT NULL
 );

db/migrations/postgres/20260131021850_add_chunks.sql

@@ -3,6 +3,7 @@ CREATE TABLE chunks (
     id BIGSERIAL PRIMARY KEY,
     hash TEXT NOT NULL UNIQUE,
     size INTEGER NOT NULL CHECK (size >= 0),
+    compressed_size INTEGER NOT NULL DEFAULT 0 CHECK (compressed_size >= 0),
     created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
     updated_at TIMESTAMPTZ
 );

db/migrations/sqlite/20260131021850_add_chunks.sql

@@ -3,6 +3,7 @@ CREATE TABLE chunks (
     id INTEGER PRIMARY KEY AUTOINCREMENT,
     hash TEXT NOT NULL UNIQUE,
     size INTEGER NOT NULL CHECK (size >= 0),
+    compressed_size INTEGER NOT NULL DEFAULT 0 CHECK (compressed_size >= 0),
     created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
     updated_at TIMESTAMP
 );

db/schema/mysql.sql

@@ -26,6 +26,7 @@ CREATE TABLE `chunks` (
   `id` bigint(20) NOT NULL AUTO_INCREMENT,
   `hash` varchar(64) NOT NULL,
   `size` int(10) unsigned NOT NULL,
+  `compressed_size` int(10) unsigned NOT NULL DEFAULT 0,
   `created_at` timestamp NOT NULL DEFAULT current_timestamp(),
   `updated_at` timestamp NULL DEFAULT NULL,
   PRIMARY KEY (`id`),

db/schema/postgres.sql

@@ -22,8 +22,10 @@ CREATE TABLE public.chunks (
     id bigint NOT NULL,
     hash text NOT NULL,
     size integer NOT NULL,
+    compressed_size integer DEFAULT 0 NOT NULL,
     created_at timestamp without time zone DEFAULT CURRENT_TIMESTAMP NOT NULL,
     updated_at timestamp with time zone,
+    CONSTRAINT chunks_compressed_size_check CHECK ((compressed_size >= 0)),
     CONSTRAINT chunks_size_check CHECK ((size >= 0))
 );
 

db/schema/sqlite.sql

@@ -51,6 +51,7 @@ CREATE TABLE chunks (
     id INTEGER PRIMARY KEY AUTOINCREMENT,
     hash TEXT NOT NULL UNIQUE,
     size INTEGER NOT NULL CHECK (size >= 0),
+    compressed_size INTEGER NOT NULL DEFAULT 0 CHECK (compressed_size >= 0),
     created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
     updated_at TIMESTAMP
 );