chore: repo hygiene — gitignore, LF normalization, drop compiled bytecode and deploy tarball

The March upload accidentally included server/__pycache__/*.pyc (stale
compiled bytecode) and a prebuilt deploy tarball. The README already
instructs users to build their own bundle, so neither belongs in git.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

.gitattributes

@@ -0,0 +1,9 @@
+# Normalize line endings: store as LF in repo, keep LF on checkout
+* text=auto eol=lf
+
+# Binary types (never modify)
+*.gz binary
+*.png binary
+*.jpg binary
+*.webp binary
+*.ico binary

.gitignore

@@ -0,0 +1,15 @@
+# Python runtime artifacts
+__pycache__/
+*.py[cod]
+
+# Secrets & runtime data — never commit
+.env
+*.db
+
+# Deploy bundles (built locally per the README, not distributed via git)
+*.tar.gz
+
+# Local working files kept out of the published repo
+README_old.md
+termux_relay.py
+termux_relay_v2.py