Add expdb submodule for exploit intelligence

[RndU53r]

Summary

• Adds RndU53r/expdb as a git submodule at expdb/ (Exploit-DB mirror + external/ CVE PoC collections)
• Documents clone instructions with git clone --recurse-submodules and git submodule update --init --recursive
• Adds a README section on using SearchSploit to correlate scan results with known SAP-related exploits/CVEs

Same integration pattern as sap-security-research (submodule, not vendored copy — the repo is multi-GB).

Integration method

Item	Value
Path	expdb/
Type	Git submodule
Upstream	https://github.com/RndU53r/expdb
Pinned commit	084f3f2d (main)

The submodule is not bundled into the container image (Dockerfile unchanged). Researchers initialize it locally when needed.

Test plan

• git clone --recurse-submodules populates expdb/ after submodule init completes
• ./expdb/searchsploit sap returns results (requires submodule checkout)
• git submodule update --init works on an existing clone without --recurse-submodules
• Container build remains unaffected (no Dockerfile changes)

Made with Cursor