feat: add wallet profile database schema and repositories (#11)

- Add SQLAlchemy models for wallet profiles, funding transfers, and relationships
- Add WalletRepository, FundingRepository, RelationshipRepository with async support
- Add DatabaseManager for connection and session management
- Add Alembic migration for initial schema
- Include comprehensive test suite with 21 tests using in-memory SQLite

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

alembic/env.py

@@ -0,0 +1,71 @@
+"""Alembic migration environment configuration."""
+
+import os
+from logging.config import fileConfig
+
+from alembic import context
+from sqlalchemy import engine_from_config, pool
+
+from polymarket_insider_tracker.storage.models import Base
+
+# this is the Alembic Config object
+config = context.config
+
+# Interpret the config file for Python logging
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+# Target metadata for 'autogenerate' support
+target_metadata = Base.metadata
+
+# Get database URL from environment variable or config
+database_url = os.environ.get("SQLALCHEMY_DATABASE_URL")
+if database_url:
+    config.set_main_option("sqlalchemy.url", database_url)
+
+
+def run_migrations_offline() -> None:
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL and not an Engine,
+    though an Engine is acceptable here as well. By skipping the Engine
+    creation we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+    """
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(
+        url=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online() -> None:
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine and associate a
+    connection with the context.
+    """
+    connectable = engine_from_config(
+        config.get_section(config.config_ini_section, {}),
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+
+    with connectable.connect() as connection:
+        context.configure(connection=connection, target_metadata=target_metadata)
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

alembic/script.py.mako

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+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision: str = ${repr(up_revision)}
+down_revision: Union[str, None] = ${repr(down_revision)}
+branch_labels: Union[str, Sequence[str], None] = ${repr(branch_labels)}
+depends_on: Union[str, Sequence[str], None] = ${repr(depends_on)}
+
+
+def upgrade() -> None:
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    ${downgrades if downgrades else "pass"}

alembic/versions/20260104_0000_initial_schema.py

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+"""Initial schema for wallet profiles and funding transfers.
+
+Revision ID: 001_initial
+Revises:
+Create Date: 2026-01-04 00:00:00.000000+00:00
+"""
+
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision: str = "001_initial"
+down_revision: Union[str, None] = None
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    # Wallet profiles table
+    op.create_table(
+        "wallet_profiles",
+        sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
+        sa.Column("address", sa.String(42), nullable=False),
+        sa.Column("nonce", sa.Integer(), nullable=False),
+        sa.Column("first_seen_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("is_fresh", sa.Boolean(), nullable=False),
+        sa.Column("matic_balance", sa.Numeric(30, 0), nullable=True),
+        sa.Column("usdc_balance", sa.Numeric(20, 6), nullable=True),
+        sa.Column("analyzed_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
+        sa.PrimaryKeyConstraint("id"),
+        sa.UniqueConstraint("address"),
+    )
+    op.create_index("idx_wallet_profiles_address", "wallet_profiles", ["address"])
+
+    # Funding transfers table
+    op.create_table(
+        "funding_transfers",
+        sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
+        sa.Column("from_address", sa.String(42), nullable=False),
+        sa.Column("to_address", sa.String(42), nullable=False),
+        sa.Column("amount", sa.Numeric(30, 6), nullable=False),
+        sa.Column("token", sa.String(10), nullable=False),
+        sa.Column("tx_hash", sa.String(66), nullable=False),
+        sa.Column("block_number", sa.Integer(), nullable=False),
+        sa.Column("timestamp", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+        sa.PrimaryKeyConstraint("id"),
+        sa.UniqueConstraint("tx_hash"),
+    )
+    op.create_index("idx_funding_transfers_to", "funding_transfers", ["to_address"])
+    op.create_index("idx_funding_transfers_from", "funding_transfers", ["from_address"])
+    op.create_index("idx_funding_transfers_block", "funding_transfers", ["block_number"])
+
+    # Wallet relationships table
+    op.create_table(
+        "wallet_relationships",
+        sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
+        sa.Column("wallet_a", sa.String(42), nullable=False),
+        sa.Column("wallet_b", sa.String(42), nullable=False),
+        sa.Column("relationship_type", sa.String(20), nullable=False),
+        sa.Column("confidence", sa.Numeric(3, 2), nullable=False),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+        sa.PrimaryKeyConstraint("id"),
+        sa.UniqueConstraint(
+            "wallet_a", "wallet_b", "relationship_type", name="uq_wallet_relationship"
+        ),
+    )
+    op.create_index("idx_wallet_relationships_a", "wallet_relationships", ["wallet_a"])
+    op.create_index("idx_wallet_relationships_b", "wallet_relationships", ["wallet_b"])
+
+
+def downgrade() -> None:
+    op.drop_index("idx_wallet_relationships_b", table_name="wallet_relationships")
+    op.drop_index("idx_wallet_relationships_a", table_name="wallet_relationships")
+    op.drop_table("wallet_relationships")
+
+    op.drop_index("idx_funding_transfers_block", table_name="funding_transfers")
+    op.drop_index("idx_funding_transfers_from", table_name="funding_transfers")
+    op.drop_index("idx_funding_transfers_to", table_name="funding_transfers")
+    op.drop_table("funding_transfers")
+
+    op.drop_index("idx_wallet_profiles_address", table_name="wallet_profiles")
+    op.drop_table("wallet_profiles")