chore: cleanup images (#14380)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **New Features**
* Added canary build version support with automatic validation and
age-based restrictions for testing pre-release versions.

* **Chores**
* Enhanced Docker build process with multi-stage builds, image
optimization, and memory allocation improvements.
  * Reorganized dependencies to distinguish development-only packages.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/base/utils/client-version.ts

@@ -0,0 +1,91 @@
+const DAY_MS = 24 * 60 * 60 * 1000;
+
+// Example: 2026.2.6-canary.015
+const CANARY_DATE_VERSION_RE =
+  /^v?(\d{4})\.(\d{1,2})\.(\d{1,2})-canary\.(\d+)(?:\+.*)?$/i;
+
+export const CANARY_CLIENT_VERSION_MAX_AGE_DAYS = 62; // ~2 months
+export const CANARY_CLIENT_VERSION_MAX_FUTURE_SKEW_DAYS = 2;
+
+export type CanaryDateClientVersion = {
+  raw: string;
+  normalized: string;
+  dateMs: number;
+};
+
+export function parseCanaryDateClientVersion(
+  version: string
+): CanaryDateClientVersion | null {
+  const raw = version.trim();
+  const match = CANARY_DATE_VERSION_RE.exec(raw);
+  if (!match) {
+    return null;
+  }
+
+  const year = Number.parseInt(match[1], 10);
+  const month = Number.parseInt(match[2], 10);
+  const day = Number.parseInt(match[3], 10);
+  const build = match[4].replace(/^0+(?=\d)/, '');
+
+  if (
+    !Number.isInteger(year) ||
+    !Number.isInteger(month) ||
+    !Number.isInteger(day) ||
+    year < 0 ||
+    month < 1 ||
+    month > 12 ||
+    day < 1 ||
+    day > 31
+  ) {
+    return null;
+  }
+
+  const dateMs = Date.UTC(year, month - 1, day);
+  const date = new Date(dateMs);
+  if (
+    date.getUTCFullYear() !== year ||
+    date.getUTCMonth() !== month - 1 ||
+    date.getUTCDate() !== day
+  ) {
+    return null;
+  }
+
+  return {
+    raw,
+    normalized: `${year}.${month}.${day}-canary.${build}`,
+    dateMs,
+  };
+}
+
+export type CanaryClientVersionCheckResult =
+  | { matched: false }
+  | { matched: true; allowed: boolean; normalized: string };
+
+export function checkCanaryDateClientVersion(
+  version: string,
+  options?: {
+    nowMs?: number;
+    maxAgeDays?: number;
+    maxFutureSkewDays?: number;
+  }
+): CanaryClientVersionCheckResult {
+  const parsed = parseCanaryDateClientVersion(version);
+  if (!parsed) {
+    return { matched: false };
+  }
+
+  const nowMs = options?.nowMs ?? Date.now();
+  const maxAgeDays = options?.maxAgeDays ?? CANARY_CLIENT_VERSION_MAX_AGE_DAYS;
+  const maxFutureSkewDays =
+    options?.maxFutureSkewDays ?? CANARY_CLIENT_VERSION_MAX_FUTURE_SKEW_DAYS;
+
+  const ageMs = nowMs - parsed.dateMs;
+  const maxAgeMs = maxAgeDays * DAY_MS;
+  const maxFutureSkewMs = maxFutureSkewDays * DAY_MS;
+
+  return {
+    matched: true,
+    allowed: ageMs <= maxAgeMs && ageMs >= -maxFutureSkewMs,
+    normalized: parsed.normalized,
+  };
+}

packages/backend/server/src/base/utils/index.ts

@@ -1,3 +1,4 @@
+export * from './client-version';
 export * from './duration';
 export * from './promise';
 export * from './request';