TigerStyle: missing key-empty preconditions on string ops

[nerdsane]

Context

Found during code review of bitmap implementation (commit e9be18b).

Problem

Most string command implementations in src/redis/executor/string_ops.rs lack debug_assert!(!key.is_empty()) entry preconditions. Only incr_by_impl (line 559) has one. For consistency, all public string ops should have it:

• execute_get
• execute_append
• execute_getset
• execute_strlen
• execute_getrange
• execute_setrange
• execute_setbit / execute_getbit (bitmap_ops.rs)

Severity

Low — defensive assertion, not a runtime bug.

Found By

TigerStyle review agent (Issues 4, 12)