Update README with security audit information

Author: shafu0x

README.md

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+```
+ ███▄ ▄███▓▓█████  ██▀███   ██▓▄▄▄█████▓     ██████▓██   ██▓  ██████ ▄▄▄█████▓▓█████  ███▄ ▄███▓  ██████
+▓██▒▀█▀ ██▒▓█   ▀ ▓██ ▒ ██▒▓██▒▓  ██▒ ▓▒   ▒██    ▒ ▒██  ██▒▒██    ▒ ▓  ██▒ ▓▒▓█   ▀ ▓██▒▀█▀ ██▒▒██    ▒
+▓██    ▓██░▒███   ▓██ ░▄█ ▒▒██▒▒ ▓██░ ▒░   ░ ▓██▄    ▒██ ██░░ ▓██▄   ▒ ▓██░ ▒░▒███   ▓██    ▓██░░ ▓██▄
+▒██    ▒██ ▒▓█  ▄ ▒██▀▀█▄  ░██░░ ▓██▓ ░      ▒   ██▒ ░ ▐██▓░  ▒   ██▒░ ▓██▓ ░ ▒▓█  ▄ ▒██    ▒██   ▒   ██▒
+▒██▒   ░██▒░▒████▒░██▓ ▒██▒░██░  ▒██▒ ░    ▒██████▒▒ ░ ██▒▓░▒██████▒▒  ▒██▒ ░ ░▒████▒▒██▒   ░██▒▒██████▒▒
+░ ▒░   ░  ░░░ ▒░ ░░ ▒▓ ░▒▓░░▓    ▒ ░░      ▒ ▒▓▒ ▒ ░  ██▒▒▒ ▒ ▒▓▒ ▒ ░  ▒ ░░   ░░ ▒░ ░░ ▒░   ░  ░▒ ▒▓▒ ▒ ░
+░  ░      ░ ░ ░  ░  ░▒ ░ ▒░ ▒ ░    ░       ░ ░▒  ░ ░▓██ ░▒░ ░ ░▒  ░ ░    ░     ░ ░  ░░  ░      ░░ ░▒  ░ ░
+░      ░      ░     ░░   ░  ▒ ░  ░         ░  ░  ░  ▒ ▒ ░░  ░  ░  ░    ░         ░   ░      ░   ░  ░  ░
+       ░      ░  ░   ░      ░                    ░  ░ ░           ░              ░  ░       ░         ░
+                                                    ░ ░
+```
+
 # Merit Escrow
 
 Escrow contract for secure token distributions with signature-based claims.
@@ -20,11 +33,4 @@ forge test
 
 ## Audits
 
-Multiple security audits have been conducted:
-
-- [QAQA Audit #1](audits/01_audit-escrow-qaqa.pdf)
-- [Trust Security Audit #1](audits/02_audit-escrow-trust.pdf)
-- [QAQA Audit #2](audits/03_audit-escrow-qaqa-2.pdf)
-- [Trust Security Audit #2](audits/04_audit-escrow-trust-2.pdf)
-- [QAQA Audit #3](audits/05_audit-escrow-qaqa-3.pdf)
-- [Trust Security Audit #3](audits/06_audit-escrow-trust-3.pdf)
+Multiple security audits have been conducted. See the [audits directory](audits/) for all audit reports.