feat: Add command metadata and update tests

[bravo1goingdark]

Add #[valkey_command] Metadata & KeySpecs for Bloom Filter Commands

This PR adds the #[valkey_command] macro to all Bloom Filter commands in src/lib.rs, enabling proper SetCommandInfo support through the valkeymodule-rs crate.
The macro now provides Valkey with complete metadata, including:

• Command name
• Flags
• Arity
• KeySpec definitions (key position, read/write semantics, key ranges)

As a result, COMMAND INFO BF.* now correctly reports the KeySpec metadata for each Bloom Filter command.

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Changes Included

Added #[valkey_command] to all Bloom Filter commands:

• BF.ADD
• BF.MADD
• BF.EXISTS
• BF.MEXISTS
• BF.CARD
• BF.RESERVE
• BF.INFO
• BF.INSERT
• BF.LOAD

Implemented complete KeySpecs for each command:

• begin_search
• find_keys
• Key flags (rw, insert, update, access)

Updated tests in tests/test_bloom_command.py:

• Adjusted expected arities
• Added KeySpec validation checks

Minor cleanup:

• Improved string formatting in:
  • src/bloom/data_type.rs
  • src/bloom/utils.rs

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Notes / Limitations

The current version of valkeymodule-rs does not support argument metadata (args:) in SetCommandInfo.
Because of this limitation, this PR implements all supported metadata (KeySpecs), but cannot yet add full CLI argument autocomplete like the built-in SET command.

Once args support is added upstream in valkeymodule-rs, I can follow up with another PR to provide complete argument specifications for full autocomplete.

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Verification

Example output of COMMAND INFO BF.ADD, showing that KeySpec metadata is now present: