fix(cli): timeline tag width, test env isolation, and logging verbosity

Miscellaneous fixes across CLI and core modules:

- Timeline: widen TAG_WIDTH from 10 to 11 to accommodate longer event
  type labels without truncation
- render.rs: save and restore LORE_ICONS env var in glyph_mode test to
  prevent interference from the test environment leaking into or from
  other tests that set LORE_ICONS
- logging.rs: adjust verbose=1 to info level (was debug), verbose=2 to
  debug — this reduces noise at -v while keeping -vv as the full debug
  experience
- issues.rs, merge_requests.rs: use infodebug! macro consistently for
  ingestion summary logging

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

src/cli/render.rs

@@ -1254,7 +1254,15 @@ mod tests {
 
     #[test]
     fn glyph_mode_force_ascii_is_fallback_when_no_explicit_icon_mode() {
-        assert_eq!(GlyphMode::detect(None, true), GlyphMode::Ascii);
+        // Clear env var so it doesn't short-circuit the force_ascii path.
+        // SAFETY: tests run single-threaded per process for env-var-dependent tests.
+        let saved = std::env::var("LORE_ICONS").ok();
+        unsafe { std::env::remove_var("LORE_ICONS") };
+        let result = GlyphMode::detect(None, true);
+        if let Some(v) = saved {
+            unsafe { std::env::set_var("LORE_ICONS", v) };
+        }
+        assert_eq!(result, GlyphMode::Ascii);
     }
 
     #[test]