chore: clean up repo for public release

- Remove BMAD framework, IDE configs, dev screenshots, test files,
  internal docs, and backup files
- Rename keep-notes/ to memento-note/
- Update all references from keep-notes to memento-note
- Add Apache 2.0 license with Commons Clause (non-commercial restriction)
- Add clean .gitignore and .env.docker.example

memento-note/lib/config.ts

@@ -0,0 +1,56 @@
+import prisma from './prisma'
+import { unstable_cache } from 'next/cache'
+
+export async function getSystemConfig() {
+  try {
+    const configs = await prisma.systemConfig.findMany()
+    return configs.reduce((acc, conf) => {
+      acc[conf.key] = conf.value
+      return acc
+    }, {} as Record<string, string>)
+  } catch (e) {
+    console.error('Failed to load system config from DB:', e)
+    return {}
+  }
+}
+
+/**
+ * Get a config value with a default fallback
+ */
+export async function getConfigValue(key: string, defaultValue: string = ''): Promise<string> {
+  const config = await getSystemConfig()
+  return config[key] || defaultValue
+}
+
+/**
+ * Get a numeric config value with a default fallback
+ */
+export async function getConfigNumber(key: string, defaultValue: number): Promise<number> {
+  const value = await getConfigValue(key, String(defaultValue))
+  const num = parseFloat(value)
+  return isNaN(num) ? defaultValue : num
+}
+
+/**
+ * Get a boolean config value with a default fallback
+ */
+export async function getConfigBoolean(key: string, defaultValue: boolean): Promise<boolean> {
+  const value = await getConfigValue(key, String(defaultValue))
+  return value === 'true'
+}
+
+/**
+ * Search configuration defaults
+ */
+export const SEARCH_DEFAULTS = {
+  SEMANTIC_THRESHOLD: 0.65,
+  RRF_K_BASE: 20,
+  RRF_K_ADAPTIVE: true,
+  KEYWORD_BOOST_EXACT: 2.0,
+  KEYWORD_BOOST_CONCEPTUAL: 0.7,
+  SEMANTIC_BOOST_EXACT: 0.7,
+  SEMANTIC_BOOST_CONCEPTUAL: 1.5,
+  QUERY_EXPANSION_ENABLED: false,
+  QUERY_EXPANSION_MAX_SYNONYMS: 3,
+  DEBUG_MODE: false,
+} as const