feat: add wechat publish recovery and conversation memory

schema.sql

@@ -1032,3 +1032,43 @@ CREATE TABLE IF NOT EXISTS h5_experience (
   KEY idx_h5_experience_scope_updated (scope, updated_at),
   FULLTEXT KEY ftx_h5_experience (title, body)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+CREATE TABLE IF NOT EXISTS h5_conversation_messages (
+  id CHAR(64) PRIMARY KEY,
+  user_id CHAR(36) NOT NULL,
+  agent_session_id VARCHAR(128) NOT NULL,
+  message_key VARCHAR(128) NOT NULL,
+  sequence_no INT NOT NULL DEFAULT 0,
+  role VARCHAR(32) NOT NULL,
+  text MEDIUMTEXT NOT NULL,
+  raw_json LONGTEXT NULL,
+  analyzed_at BIGINT NULL,
+  created_at BIGINT NOT NULL,
+  updated_at BIGINT NOT NULL,
+  UNIQUE KEY uq_h5_conversation_message (agent_session_id, message_key),
+  KEY idx_h5_conversation_user_created (user_id, created_at),
+  KEY idx_h5_conversation_user_analyzed (user_id, analyzed_at),
+  CONSTRAINT fk_h5_conversation_user FOREIGN KEY (user_id) REFERENCES h5_users(id) ON DELETE CASCADE,
+  CONSTRAINT fk_h5_conversation_session FOREIGN KEY (agent_session_id) REFERENCES h5_user_sessions(agent_session_id) ON DELETE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+CREATE TABLE IF NOT EXISTS h5_user_memory_items (
+  id CHAR(64) PRIMARY KEY,
+  user_id CHAR(36) NOT NULL,
+  label ENUM('preference', 'habit', 'interest', 'goal', 'fact', 'experience', 'knowledge') NOT NULL DEFAULT 'fact',
+  memory_hash CHAR(64) NOT NULL,
+  memory_text TEXT NOT NULL,
+  evidence_message_id CHAR(64) NULL,
+  source_session_id VARCHAR(128) NULL,
+  confidence DECIMAL(4,3) NOT NULL DEFAULT 0.600,
+  status ENUM('active', 'archived', 'deleted') NOT NULL DEFAULT 'active',
+  raw_json JSON NULL,
+  created_at BIGINT NOT NULL,
+  updated_at BIGINT NOT NULL,
+  UNIQUE KEY uq_h5_user_memory_hash (user_id, memory_hash),
+  KEY idx_h5_user_memory_user_label (user_id, label, updated_at),
+  KEY idx_h5_user_memory_session (source_session_id),
+  CONSTRAINT fk_h5_user_memory_user FOREIGN KEY (user_id) REFERENCES h5_users(id) ON DELETE CASCADE,
+  CONSTRAINT fk_h5_user_memory_evidence FOREIGN KEY (evidence_message_id) REFERENCES h5_conversation_messages(id) ON DELETE SET NULL,
+  CONSTRAINT fk_h5_user_memory_session FOREIGN KEY (source_session_id) REFERENCES h5_user_sessions(agent_session_id) ON DELETE SET NULL
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;