825 add connectors for duckdb access

[mborodii-prog]

Add DuckDB and Microsoft Access connectors

Summary

• Adds a duckdb connector (wrangles/connectors/duckdb.py) with read/write/run operations, backed by the duckdb package.
• Adds an access connector (wrangles/connectors/access.py) for Microsoft Access databases with read/write/run operations, backed by pyodbc.
• Registers both connectors in wrangles/connectors/__init__.py so they're usable from recipes (duckdb: / access: keys) and from the Python API.
• Documents the new optional dependencies in README.md and requirements-full.txt (duckdb>=1.0.0, pyodbc>=5.0.0).
• Adds connector tests (tests/connectors/test_duckdb.py, tests/connectors/test_access.py), skipped automatically if the optional dependency isn't installed.

Usage

DuckDB — Python API

from wrangles.connectors import duckdb

# Read
df = duckdb.read(database='database.duckdb', command='SELECT * FROM table')

# Write (INSERT / REPLACE / FAIL)
duckdb.write(df, database='database.duckdb', table='table', action='REPLACE')

# Run arbitrary SQL (single command or list)
duckdb.run(database='database.duckdb', command='CREATE INDEX idx ON table(col)')

DuckDB — Recipe YAML

read:
  duckdb:
    database: database.duckdb
    command: SELECT * FROM table

wrangles:
  - ...

write:
  duckdb:
    database: database.duckdb
    table: output_table
    action: REPLACE

Microsoft Access — Python API

from wrangles.connectors import access

# Read (via database file or full connection string)
df = access.read(database='database.accdb', command='SELECT * FROM table')

# Write — auto-creates the table if it doesn't exist
access.write(df, database='database.accdb', table='table', action='INSERT')

# Run arbitrary SQL
access.run(database='database.accdb', command='DELETE FROM table WHERE id = ?', params=[42])

Microsoft Access — Recipe YAML

read:
  access:
    database: database.accdb
    command: SELECT * FROM table

wrangles:
  - ...

write:
  access:
    database: database.accdb
    table: output_table
    action: REPLACE

Both connectors also support :memory: (DuckDB) and a raw connection_string (Access) for advanced configuration, and a params argument for parameterized queries to avoid SQL injection.

New optional dependencies

Capability	Install
DuckDB	pip install duckdb
Microsoft Access	pip install pyodbc