Fix: safe shell argument forwarding and quoting in scripts

[shbhmexe]

Summary

This PR makes focused, low-risk improvements to shell scripts without changing any existing features:

• Use "$@" instead of $* where scripts iterate over or execute user-supplied arguments, preserving spaces and special characters.
• Add safer quoting in git-lfs-diff.sh when reading Git LFS pointers and computing object paths.

Updated files:

• devel/execute_on_all_databases.sh
• devel/execute_on_all_databases_k8s.sh
• devel/mass_update.sh
• util_sh/monitor_command.sh
• git-lfs-diff.sh

Reasoning

• collapses all parameters into a single word separated by the first character of IFS, which breaks when arguments include spaces or glob characters. "$@" preserves each original argument.
• Quoting variable expansions and the revision:path argument in git-lfs-diff.sh prevents word-splitting and path parsing issues for file names with spaces.

Impact

• Improves correctness and stability when scripts are invoked with multiple arguments and file names containing spaces.
• No behavioral changes beyond safer argument handling. Default flows and outputs are preserved.

Verification

• Changes are POSIX-compatible for /bin/sh scripts and compatible with /bin/bash for bash scripts.
• The diff is limited to argument iteration/execution lines and quoting; no logic was altered.