fix: resolve integration test compilation + CI errors

Test compilation fixes (8 integration test files):
  1. Ambiguous float types — added f32/f64 annotations
  2. chrono API — replaced with_hour() with date_naive().and_hms_opt()
  3. Missing dev-dependencies — added sqlx + base64
  4. Generic parse — wrapped f32 comparison in parens
  5. Incorrect assertion — 3^5=243 > 100, changed nodes to 1000

CI fixes:
  6. Missing benchmark fixtures — created 3 files in fixtures/benchmarks/
  7. clippy absurd_extreme_comparisons — usize >= 0 always true
  8. authentik_jwt test — Option<SystemTime> type mismatch
  9. http_server tests — removed broken RBAC test module (types deleted)

Result: cargo build --all clean, cargo test --all --lib passes

Dockerfile

@@ -10,7 +10,9 @@ COPY . .
 
 # Build the mem binary (offline sqlx - uses .sqlx/ cache)
 ENV SQLX_OFFLINE=true
-RUN cargo build --release -p mem-cli
+RUN cargo build --release -p mem-cli && \
+    strip target/release/mem && \
+    rm -rf target/release/deps target/release/build target/release/incremental target/release/.fingerprint
 
 # Stage 2: Runtime
 FROM debian:bookworm-slim