feat: update Python processors and add utility scripts

- Update ASR, face, OCR, pose processors
- Add release pre-flight check script
- Add synonym generation, chunk processing scripts
- Add face recognition, stamp search utilities

scripts/migrations/p2_person_identity.sql

@@ -0,0 +1,33 @@
+-- P2: Person Identity & Talent Management
+-- 1. Create Talents table (Global Identities / TMDB Actors)
+CREATE TABLE IF NOT EXISTS talents (
+    id BIGSERIAL PRIMARY KEY,
+    real_name VARCHAR(255) NOT NULL UNIQUE,
+    actor_name VARCHAR(255),
+    voice_embedding TEXT,
+    face_embedding TEXT,
+    metadata JSONB DEFAULT '{}',
+    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
+);
+
+-- 2. Create Identity Bindings (Maps machine IDs to Talents)
+CREATE TABLE IF NOT EXISTS identity_bindings (
+    id BIGSERIAL PRIMARY KEY,
+    talent_id BIGINT REFERENCES talents(id) ON DELETE CASCADE,
+    binding_type VARCHAR(20) NOT NULL, -- 'face', 'speaker'
+    binding_value VARCHAR(100) NOT NULL,
+    source VARCHAR(50) DEFAULT 'manual',
+    confidence DOUBLE PRECISION DEFAULT 1.0,
+    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
+    UNIQUE(talent_id, binding_type, binding_value)
+);
+
+CREATE INDEX IF NOT EXISTS idx_identity_bindings_talent ON identity_bindings(talent_id);
+CREATE INDEX IF NOT EXISTS idx_identity_bindings_value ON identity_bindings(binding_type, binding_value);
+
+-- 3. Extend person_identities with temporal overlap and confidence fields
+ALTER TABLE person_identities ADD COLUMN IF NOT EXISTS character_name VARCHAR(255);
+ALTER TABLE person_identities ADD COLUMN IF NOT EXISTS global_person_id BIGINT REFERENCES talents(id);
+ALTER TABLE person_identities ADD COLUMN IF NOT EXISTS temporal_overlap_score DOUBLE PRECISION;
+ALTER TABLE person_identities ADD COLUMN IF NOT EXISTS audio_visual_confidence DOUBLE PRECISION;
+ALTER TABLE person_identities ADD COLUMN IF NOT EXISTS match_strategy VARCHAR(30);