chore: add credentials reference memory

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.claude/memory/MEMORY.md

@@ -3,3 +3,4 @@
 - [User profile](user_profile.md) — Matt Edholm, aviation enthusiast, pragmatic hardware builder
 - [pictureFrame project context](project_pictureframe.md) — goals, stack, hardware, current status
 - [Feedback: memory location](feedback_memory_location.md) — write project memories into repo for cross-device access
+- [Credentials reference](reference_credentials.md) — Gitea token in ~/secrets.info, SSH via id_ed25519 port 2222

.claude/memory/reference_credentials.md

@@ -0,0 +1,12 @@
+---
+name: Credentials and secrets location
+description: Where to find API tokens and credentials for this project's infrastructure
+type: reference
+---
+
+Gitea API token and other credentials are stored in `~/secrets.info`.
+
+Key found there:
+- `gitea_token` — used for `git.edholm.me` API calls (create repos, etc.)
+
+SSH access to `git.edholm.me` uses `~/.ssh/id_ed25519` (host alias configured in `~/.ssh/config`, port 2222).