fix: add missing <cstdint> in various headers (#360)

On our existing test systems (ubuntu, mac, windows), <cstdint> is
included via other system headers such that compilation succeeds.

On Arch, this isn't the case.

---------

Co-authored-by: Casey Waldren <[email protected]>

Author: keelerm84

libs/server-sdk/include/launchdarkly/server_side/all_flags_state.hpp

@@ -3,6 +3,7 @@
 #include <launchdarkly/data/evaluation_reason.hpp>
 #include <launchdarkly/value.hpp>
 
+#include <cstdint>
 #include <optional>
 #include <string>
 #include <unordered_map>
@@ -153,8 +154,8 @@ class AllFlagsState {
 
    private:
     bool const valid_;
-    const std::unordered_map<std::string, class State> flags_state_;
-    const std::unordered_map<std::string, Value> evaluations_;
+    std::unordered_map<std::string, class State> const flags_state_;
+    std::unordered_map<std::string, Value> const evaluations_;
 };
 
 void operator|=(AllFlagsState::Options& lhs, AllFlagsState::Options rhs);

libs/server-sdk/src/evaluation/bucketing.hpp

@@ -8,6 +8,7 @@
 
 #include <tl/expected.hpp>
 
+#include <cstdint>
 #include <limits>
 #include <optional>
 #include <ostream>
@@ -108,16 +109,16 @@ class BucketResult {
  * variation index for the context. For a plain variation, this is simply the
  * variation index. For a rollout, this utilizes the Bucket function.
  *
- * @param vr Variation or rollout.
+ * @param variation_or_rollout Variation or rollout.
  * @param flag_key Key of flag.
  * @param context Context to bucket.
  * @param salt Salt to use when bucketing.
  * @return A BucketResult on success, or an error if bucketing failed.
  */
 tl::expected<BucketResult, Error> Variation(
-    data_model::Flag::VariationOrRollout const& vr,
+    data_model::Flag::VariationOrRollout const& variation_or_rollout,
     std::string const& flag_key,
-    launchdarkly::Context const& context,
+    Context const& context,
     std::optional<std::string> const& salt);
 
 }  // namespace launchdarkly::server_side::evaluation

libs/server-sdk/src/evaluation/detail/semver_operations.hpp

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <cstdint>
 #include <optional>
 #include <string>
 #include <variant>
@@ -81,8 +82,8 @@ bool operator>(SemVer const& lhs, SemVer const& rhs);
  * containing a build string, it will not be present as this information
  * is discarded when parsing.
  */
-std::ostream& operator<<(std::ostream& out, SemVer const& sv);
+std::ostream& operator<<(std::ostream& out, SemVer const& semver);
 
-std::ostream& operator<<(std::ostream& out, SemVer::Token const& sv);
+std::ostream& operator<<(std::ostream& out, SemVer::Token const& semver_token);
 
 }  // namespace launchdarkly::server_side::evaluation::detail

libs/server-sdk/src/evaluation/evaluation_error.hpp

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <cstdint>
 #include <optional>
 #include <ostream>