M3a：息壤三级记忆域——归真触发提取管线/白名单明忆/重忆确认/正影版本链/删除墓碑/双通道召回注入，退役旧记忆-抽取-反思-大周天-演化管线（迁移 004，验收 7 用例）

2026-08-27 09:16:32 +08:00
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commit 9c98c2f85e
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+"""息壤记忆域：三级记忆表重建与触发/实录，退役旧记忆表
+
+Revision ID: 004
+Revises: 003
+Create Date: 2026-08-22
+
+旧 memories/memory_links 随旧记忆管线退役整体删除（开发数据丢弃语义，data-model §9），
+新表按 app/models/xirang.py 重建。
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision: str = '004'
+down_revision: Union[str, Sequence[str], None] = '003'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.drop_table('memory_links')
+    op.drop_table('memories')
+    op.create_table('memories',
+    sa.Column('id', sa.String(length=80), nullable=False),
+    sa.Column('character_id', sa.String(length=80), nullable=False),
+    sa.Column('tier', sa.String(length=20), nullable=False),
+    sa.Column('type', sa.String(length=40), nullable=False),
+    sa.Column('status', sa.String(length=20), nullable=False),
+    sa.Column('source', sa.String(length=20), nullable=False),
+    sa.Column('content', sa.Text(), nullable=False),
+    sa.Column('source_refs_json', sa.Text(), nullable=False),
+    sa.Column('sensitivity', sa.String(length=20), nullable=False),
+    sa.Column('priority', sa.Integer(), nullable=False),
+    sa.Column('confidence', sa.Float(), nullable=False),
+    sa.Column('vitality', sa.Float(), nullable=False),
+    sa.Column('valid_until', sa.DateTime(timezone=True), nullable=True),
+    sa.Column('realm', sa.String(length=40), nullable=False),
+    sa.Column('prev_version_id', sa.String(length=80), nullable=True),
+    sa.Column('recall_count', sa.Integer(), nullable=False),
+    sa.Column('last_recalled_at', sa.DateTime(timezone=True), nullable=True),
+    sa.Column('created_at', sa.DateTime(timezone=True), nullable=False),
+    sa.Column('updated_at', sa.DateTime(timezone=True), nullable=False),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_memories_character_id'), 'memories', ['character_id'], unique=False)
+    op.create_index(op.f('ix_memories_tier'), 'memories', ['tier'], unique=False)
+    op.create_index(op.f('ix_memories_type'), 'memories', ['type'], unique=False)
+    op.create_index(op.f('ix_memories_status'), 'memories', ['status'], unique=False)
+    op.create_index(op.f('ix_memories_prev_version_id'), 'memories', ['prev_version_id'], unique=False)
+    op.create_table('memory_triggers',
+    sa.Column('id', sa.String(length=80), nullable=False),
+    sa.Column('memory_id', sa.String(length=80), nullable=False),
+    sa.Column('kind', sa.String(length=20), nullable=False),
+    sa.Column('pattern', sa.String(length=200), nullable=False),
+    sa.Column('created_at', sa.DateTime(timezone=True), nullable=False),
+    sa.ForeignKeyConstraint(['memory_id'], ['memories.id'], ),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_table('factual_records',
+    sa.Column('id', sa.String(length=80), nullable=False),
+    sa.Column('character_id', sa.String(length=80), nullable=False),
+    sa.Column('canonization_id', sa.String(length=80), nullable=False),
+    sa.Column('evidence_json', sa.Text(), nullable=False),
+    sa.Column('summary', sa.Text(), nullable=False),
+    sa.Column('occurred_at', sa.DateTime(timezone=True), nullable=False),
+    sa.PrimaryKeyConstraint('id')
+    )
+
+
+def downgrade() -> None:
+    op.drop_table('factual_records')
+    op.drop_table('memory_triggers')
+    op.drop_table('memories')
+    op.create_table('memories',
+    sa.Column('id', sa.String(length=80), nullable=False),
+    sa.Column('character_id', sa.String(length=80), nullable=False),
+    sa.Column('title', sa.String(length=200), nullable=True),
+    sa.Column('content', sa.Text(), nullable=False),
+    sa.Column('source', sa.String(length=40), nullable=False),
+    sa.Column('importance', sa.Float(), nullable=False),
+    sa.Column('sensitivity', sa.String(length=20), nullable=False),
+    sa.Column('temporal_context_json', sa.Text(), nullable=False),
+    sa.Column('evidence_ids_json', sa.Text(), nullable=False),
+    sa.Column('expires_at', sa.DateTime(timezone=True), nullable=True),
+    sa.Column('deleted_at', sa.DateTime(timezone=True), nullable=True),
+    sa.Column('created_at', sa.DateTime(timezone=True), nullable=False),
+    sa.Column('updated_at', sa.DateTime(timezone=True), nullable=False),
+    sa.ForeignKeyConstraint(['character_id'], ['characters.id'], ),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_table('memory_links',
+    sa.Column('id', sa.String(length=80), nullable=False),
+    sa.Column('from_memory_id', sa.String(length=80), nullable=False),
+    sa.Column('to_memory_id', sa.String(length=80), nullable=False),
+    sa.Column('relation', sa.String(length=40), nullable=False),
+    sa.Column('created_at', sa.DateTime(timezone=True), nullable=False),
+    sa.ForeignKeyConstraint(['from_memory_id'], ['memories.id'], ),
+    sa.ForeignKeyConstraint(['to_memory_id'], ['memories.id'], ),
+    sa.PrimaryKeyConstraint('id')
+    )