fix bot lifecycle and docs

SEMVER.md

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+# Semantic Versioning Policy
+
+This project follows Semantic Versioning with the rules below.
+
+## Public API Surface
+
+The public API consists of:
+- exported identifiers in package `laniakea`
+- exported identifiers in package `tgapi`
+- documented behavior in `README.md`, `README_RU.md`, and package godoc
+
+Anything unexported is internal and may change without notice.
+
+## Breaking Changes
+
+A release requires a major version bump when it changes any of the following:
+- exported function, method, type, field, constant, or variable names
+- function or method signatures
+- JSON field names or request/response wire compatibility in `tgapi`
+- documented behavioral guarantees relied on by callers
+
+Examples:
+- removing an exported alias
+- changing callback payload encoding defaults
+- changing handler dispatch semantics in a way that breaks existing bots
+
+## Minor Changes
+
+A release uses a minor version bump for backward-compatible additions:
+- new exported types, methods, helpers, or update handlers
+- support for new Telegram Bot API fields or methods
+- optional configuration knobs that do not change existing defaults
+
+## Patch Changes
+
+A release uses a patch version bump for backward-compatible fixes:
+- bug fixes
+- test-only changes
+- godoc and README clarifications
+- internal refactors with no public behavior change
+
+## Pre-Releases
+
+`-rc.N` builds may still adjust API details before `v1.0.0`.
+Once `v1.0.0` is released, breaking changes require a new major version.