feat: add migrations, test scripts, and utility tools

- Add database migrations (006-028) for face recognition, identity, file_uuid
- Add test scripts for ASR, face, search, processing
- Add portal frontend (Tauri)
- Add config, benchmark, and monitoring utilities
- Add model checkpoints and pretrained model references

migrations/008_person_identity_binding.sql

@@ -0,0 +1,77 @@
+-- Migration: 008_person_identity_binding.sql
+-- Purpose: 建立聲紋 (Speaker ID)、人臉 (Face ID) 與真實身份 (Identity) 的綁定系統
+-- Date: 2026-04-10
+
+-- 1. 擴展 chunks 表，增加聲音與面孔的觀測值陣列
+ALTER TABLE chunks 
+ADD COLUMN IF NOT EXISTS speaker_ids TEXT[] DEFAULT '{}',   -- e.g. ['speaker_3', 'speaker_5']
+ADD COLUMN IF NOT EXISTS face_ids TEXT[] DEFAULT '{}';      -- e.g. ['face_1']
+
+-- 2. 建立真實身份表 (Talents / Persons)
+-- 存儲現實世界中的人員資訊 (演員、配音員、真實人物)
+CREATE TABLE IF NOT EXISTS talents (
+    id                  BIGSERIAL PRIMARY KEY,
+    real_name           TEXT NOT NULL,            -- 真實姓名 (e.g. "Tom Cruise")
+    actor_name          TEXT,                     -- 藝名/別名
+    voice_embedding     VECTOR(192),              -- 聲紋參考向量 (ECAPA-TDNN)
+    face_embedding      VECTOR(512),              -- 人臉參考向量 (ArcFace)
+    metadata            JSONB DEFAULT '{}',       -- 其他屬性 (性別、年齡等)
+    created_at          TIMESTAMPTZ DEFAULT NOW(),
+    UNIQUE(real_name)
+);
+
+-- 建立向量索引
+CREATE INDEX IF NOT EXISTS idx_talent_voice ON talents USING hnsw (voice_embedding vector_cosine_ops);
+CREATE INDEX IF NOT EXISTS idx_talent_face ON talents USING hnsw (face_embedding vector_cosine_ops);
+
+-- 3. 建立身份綁定映射表 (Identity Bindings)
+-- 負責將機器生成的 ID (face_x, speaker_y) 映射到 talent_id
+CREATE TABLE IF NOT EXISTS identity_bindings (
+    id                  BIGSERIAL PRIMARY KEY,
+    talent_id           BIGINT REFERENCES talents(id) ON DELETE CASCADE,
+    
+    -- 綁定類型與機器 ID
+    binding_type        VARCHAR(32) NOT NULL,     -- 'face' 或 'speaker'
+    binding_value       VARCHAR(64) NOT NULL,     -- e.g. "face_1", "speaker_3"
+    
+    -- 綁定來源與狀態
+    source              TEXT DEFAULT 'auto',      -- 'auto' (自動聚類) 或 'manual' (人工綁定)
+    confidence          FLOAT DEFAULT 0.0,
+    is_active           BOOLEAN DEFAULT TRUE,
+    
+    created_at          TIMESTAMPTZ DEFAULT NOW(),
+    
+    -- 每個機器 ID 只能綁定一個 Talent
+    UNIQUE(binding_type, binding_value)
+);
+
+-- 索引優化：加速由機器 ID 查找 Talent
+CREATE INDEX IF NOT EXISTS idx_bindings_lookup ON identity_bindings(binding_type, binding_value);
+CREATE INDEX IF NOT EXISTS idx_bindings_talent ON identity_bindings(talent_id);
+
+-- 4. (選填) 建立角色表 (Characters) - 用於動畫/多語系場景
+CREATE TABLE IF NOT EXISTS characters (
+    id                  BIGSERIAL PRIMARY KEY,
+    video_uuid          TEXT NOT NULL,
+    name                TEXT NOT NULL,            -- 角色名 (e.g. "Batman")
+    language_track      TEXT DEFAULT 'original',  -- 語言軌道 (original, dub_zh_tw)
+    is_voice_only       BOOLEAN DEFAULT FALSE,    -- 是否為無臉角色 (旁白/AI)
+    metadata            JSONB DEFAULT '{}',
+    UNIQUE(video_uuid, name, language_track)
+);
+
+-- 5. (選填) 建立飾演關係表 (Castings)
+-- 定義 Talent 在特定視頻中飾演哪個 Character
+CREATE TABLE IF NOT EXISTS castings (
+    id                  BIGSERIAL PRIMARY KEY,
+    character_id        BIGINT REFERENCES characters(id) ON DELETE CASCADE,
+    talent_id           BIGINT REFERENCES talents(id) ON DELETE CASCADE,
+    track_type          VARCHAR(32) DEFAULT 'original', -- 對應音軌版本
+    role_type           VARCHAR(32) DEFAULT 'both',     -- 'voice', 'face', 'both'
+    UNIQUE(character_id, talent_id, track_type)
+);
+
+COMMENT ON TABLE talents IS '真實人物/演員/配音員資訊庫';
+COMMENT ON TABLE identity_bindings IS '機器 ID (Face/Speaker) 與真實 Talent 的映射關係';
+COMMENT ON TABLE characters IS '視頻中的劇中角色';
+COMMENT ON TABLE castings is 'Talent 與 Character 的飾演關係';