fix(clojure): declare didChangeWatchedFiles client capability

Serena notifies language servers about files changed outside its own edit tools (a git checkout, another editor, a build step) by sending workspace/didChangeWatchedFiles from LanguageServerManager.poll_and_notify, whose docstring names this exact case: such edits are 'otherwise invisible to a warm language server, causing symbolic queries to answer from a stale index'.

ClojureLSP never declared the corresponding client capability, so clojure-lsp was not told those notifications are sent and need not treat them as a reason to invalidate its analysis. DefaultInitializeParamsBuilder does not supply a default capabilities block, so nothing filled this in on the server's behalf.

Relates to #1593, where find_symbol returned a body from a comment mentioning the symbol rather than its definition, at a position the symbol had previously occupied.

src/solidlsp/language_servers/clojure_lsp.py

@@ -325,6 +325,12 @@ class ClojureLSP(SolidLanguageServer):
                 "workspace": {
                     "applyEdit": True,
                     "workspaceEdit": {"documentChanges": True},
+                    # Serena notifies language servers about files changed outside its own
+                    # edit tools (git checkout, another editor, a build step) via
+                    # workspace/didChangeWatchedFiles; see LanguageServerManager.poll_and_notify.
+                    # Without declaring the capability, clojure-lsp is not told the client
+                    # sends those notifications and may keep answering from its stale analysis.
+                    "didChangeWatchedFiles": {"dynamicRegistration": True},
                     "symbol": {"symbolKind": {"valueSet": list(range(1, 27))}},
                     "workspaceFolders": True,
                 },