Improve port parsing patterns to prevent FlowStorm false positives (#113)

* Improve port parsing patterns with case insensitivity and bounded whitespace

- Add case-insensitive matching to port, Started, and Listening patterns
- Use bounded whitespace (\s{1,10}) instead of unbounded (\s+) for predictability
- Add optional space after colon in port number pattern (:\s?)
- Add word boundary (\b) to port pattern to prevent false matches
- Add regression test for FlowStorm output (issue #109)

These changes maintain backward compatibility with all existing nREPL
output formats while preventing false positives from FlowStorm's
'mem_reporter__4628' output that was matching the old regex.

Co-authored-by: gveres <gveres@users.noreply.github.com>

* Add word boundary before 'port' pattern for maximum strictness

Per CodeRabbit review suggestion, add \b before 'port' to prevent
edge cases like 'support 12345' or 'transport 12345', and restrict
to 4-5 digits for consistency with other patterns.

---------

Co-authored-by: Bruce Hauman <bhauman@gmail.com>
Co-authored-by: gveres <gveres@users.noreply.github.com>

Author: 3 people

src/clojure_mcp/nrepl_launcher.clj

@@ -15,11 +15,10 @@
    Returns the port number as an integer or nil if not found."
   [output]
   (when output
-    (let [patterns [#"(?i)nrepl.*?port[^\d]*(\d+)" ; nREPL server started on port 12345
-                    #"(?i)port[^\d]*(\d+)" ; port 12345, port: 12345
-                    #":(\d{4,5})\b" ; :12345 (4-5 digit ports)
-                    #"Started.*?(\d{4,5})\b" ; Started on 12345
-                    #"Listening.*?(\d{4,5})\b"] ; Listening on 12345
+    (let [patterns [#"(?i)\bport\s{1,10}(\d{4,5})\b" ; port 12345
+                    #":\s?(\d{4,5})\b" ; :12345 or : 12345 (4-5 digit ports)
+                    #"(?i)Started on\s{1,10}(\d{4,5})\b" ; Started on 12345
+                    #"(?i)Listening on\s{1,10}(\d{4,5})\b"] ; Listening on 12345
           line (str/trim output)]
       (some (fn [pattern]
               (when-let [match (re-find pattern line)]

test/clojure_mcp/nrepl_launcher_test.clj

@@ -26,7 +26,9 @@
         "port abc" ; non-numeric
         "port 123" ; too small (below 1024)
         "port 999999" ; too large (above 65535)
-        "random text"))
+        "random text"
+        ;; FlowStorm output should not match (issue #109)
+        "flow_storm.jobs$run_jobs$mem_reporter__4628@348137e8 function scheduled every 1000 millis"))
 
     (testing "handles case insensitive matching"
       (are [output expected] (= expected (launcher/parse-port-from-output output))